Could not find the main class!

epitox

Mitglied
Hallo liebe Forenuser,

ich habe schon wieder ein ärgerliches Problem:

Habe ein Programm geschrieben, dass Text-Dateien einlesen kann und diese anhand eines übergebenen Keys verschlüsselt.

Wenn ich das Programm aus Netbeans heraus ausführe (RUN) funktioniert alles
Wenn ich´s über die Konsole aufrufe (java -jar "Pfad\letscryptit.jar") funktioniert es ebenfalls.
Wenn ich aber die JAR-Datei öffnen möchte, meldet er mir, dass die main-class nicht gefunden wurde.

In den Project-Properties steht die richtige Klasse.

Hier mal mein Code

Klasse cryptframe (Main-Class)

Java:
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package cryptpackage;

/**
 *
 * @author dha
 */
public class cryptframe extends javax.swing.JFrame {

 static int key;
    static String datname;
    /**
     * Creates new form cryptframe
     */
    public cryptframe() {
        initComponents();
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jTextField2 = new javax.swing.JTextField();
        jLabel4 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        abbrechen = new javax.swing.JButton();
        decrypt = new javax.swing.JButton();
        encrypt = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jPanel1.setBackground(new java.awt.Color(255, 153, 0));

        jLabel1.setFont(new java.awt.Font("Tahoma", 2, 24)); // NOI18N
        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel1.setText("Let´s Crypt!");

        jLabel4.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        jLabel4.setText("(leer = test.txt)");

        jLabel3.setText("Datei-Name:");

        jLabel2.setText("Key eingeben:");

        abbrechen.setText("ABBRECHEN");
        abbrechen.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                abbrechenActionPerformed(evt);
            }
        });

        decrypt.setText("Decrypt");
        decrypt.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                decryptActionPerformed(evt);
            }
        });

        encrypt.setText("Encrypt");
        encrypt.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                encryptActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(215, 215, 215)
                        .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 209, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(97, 97, 97)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(abbrechen, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(decrypt, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(encrypt, javax.swing.GroupLayout.PREFERRED_SIZE, 93, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(70, 70, 70)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                            .addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 77, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(jTextField1)
                            .addComponent(jTextField2)
                            .addComponent(jLabel4, javax.swing.GroupLayout.PREFERRED_SIZE, 93, javax.swing.GroupLayout.PREFERRED_SIZE))))
                .addContainerGap(206, Short.MAX_VALUE))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(22, 22, 22)
                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 99, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(encrypt))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(decrypt))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel4)
                    .addComponent(abbrechen))
                .addContainerGap(118, Short.MAX_VALUE))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jPanel1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );

        pack();
    }// </editor-fold>

    private void abbrechenActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        jTextField1.setText(null);
        jTextField2.setText(null);
        jTextField1.setEditable(true);
    }

    private void decryptActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        Writer.letsroll();
        String keys = jTextField1.getText();
        key = Integer.parseInt(keys);
        datname = jTextField2.getText();
    }

    private void encryptActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:

        String keys = jTextField1.getText();
        key = Integer.parseInt(keys);
        datname = jTextField2.getText();
        if (datname.length() == 0) {
            datname = "test.txt";
        }
        jTextField1.setEditable(false);

        Reader.runit();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /*
         * Set the Nimbus look and feel
         */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /*
         * If Nimbus (introduced in Java SE 6) is not available, stay with the
         * default look and feel. For details see
         * [url=http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html]How to Set the Look and Feel (The Java™ Tutorials > Creating a GUI With JFC/Swing > Modifying the Look and Feel)[/url]
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(cryptframe.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(cryptframe.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(cryptframe.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(cryptframe.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /*
         * Create and display the form
         */
        java.awt.EventQueue.invokeLater(new Runnable() {

            public void run() {
                new cryptframe().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton abbrechen;
    private javax.swing.JButton decrypt;
    private javax.swing.JButton encrypt;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    // End of variables declaration
}

Klasse Reader

Java:
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package cryptpackage;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.LinkedList;
import java.util.List;

public class Reader {

	//LinkedList für eingelesene Daten
	private List<String> _input = new LinkedList<String>();

	public Reader(int key, String datei) {
		read(datei);
		printInfo();
		fileTransfer(key);
		printInfo();
		write();
	}

	//Ausgabe der Informationen aus der LinkedList
	private void printInfo() {
		for (int i = 0; i < _input.size(); i++) {
			System.out.println(_input.get(i));
		}

	}

	//Methode um jedes Element der LinkedList zu encodieren
	//Parameter ist eine Zahl, welche Anzahl Verschiebungen anzeigt
	public void fileTransfer(int key) {
		int index = 0;
		for (index = 0; index < _input.size(); index++) {

			_input.set(index, encode(key, _input.get(index)));
		}
	}

	//Code wird encodiert durch Eingabe des Keys
	//Verschiebung findet nur bei Buchstaben statt, alle anderen Zeichen bleiben unberücksichtigt
	private String encode(int key, String code) {

		int i = 0;
		int temp;
		char file[] = code.toCharArray();
		while (i < code.length()) {
			if (file[i] >= 'a' && file[i] <= 'z') {
				if ((file[i] + key) > 'z') {
					temp = ((file[i] + key) - 'z');
					file[i] = (char) (('a' - 1) + temp);
				} else {
					file[i] = (char) (file[i] + key);
				}
			} else if (file[i] >= 'A' && file[i] <= 'Z') {
				if ((file[i] + key) > 'Z') {
					temp = ((file[i] + key) - 'Z');
					file[i] = (char) (('A' - 1) + temp);
				} else {
					file[i] = (char) (file[i] + key);
				}
			}
			i++;
		}
		return String.valueOf(file);

	}

	//Datei wird mithilfe des BufferReaders ausgelesen und in die LinkedList geschrieben
	private void read(String datei) {
		BufferedReader in = null;
		String value = "";
		try {
			in = new BufferedReader(new InputStreamReader(new FileInputStream(
					datei)));
		} catch (FileNotFoundException e) {
			System.out.println(e.getMessage());
		}

		try {
			while (null != (value = in.readLine())) {
				_input.add(value);
			}
		} catch (IOException e) {
			System.out.println(e.getMessage());
		}

	}

	//LinkedList wird in ein File geschriebne und im Explorer abgespeichert
	private void write() {
		String text;
		BufferedWriter out = null;

		try {
			out = new BufferedWriter(new OutputStreamWriter(
					new FileOutputStream("decode.txt")));
			for (int i = 0; i < _input.size(); i++) {
				text = _input.get(i).toString();
				out.write(text, 0, text.length());
				out.newLine();
			}
		} catch (IOException ex) {
			System.out.println(ex);
		} finally {
			if (out != null)
				try {
					out.close();
				} catch (IOException e) {

					System.out.println(e.getMessage());
				}
		}
	}
        public static void runit ()
        {
            new Reader(cryptframe.key, cryptframe.datname);
            
        }

	
}

Klasse Writer

Java:
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package cryptpackage;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.LinkedList;
import java.util.List;

public class Writer {

	//LinkedList für eingelesene Daten
	private List<String> _input = new LinkedList<String>();

	public Writer(int key, String datei) {
		read(datei);
		fileTransfer(key);
		printInfo();
		write();
	}

	//Ausgabe der Informationen aus der LinkedList
	private void printInfo() {
		for (int i = 0; i < _input.size(); i++) {
			System.out.println(_input.get(i));
		}

	}

	//Methode um jedes Element der LinkedList zu decodieren
	//Parameter ist eine Zahl, welche Anzahl Verschiebungen anzeigt
	public void fileTransfer(int key) {
		int index = 0;
		for (index = 0; index < _input.size(); index++) {

			_input.set(index, decode(key, _input.get(index)));
		}
	}

	//Code wird decodiert durch Eingabe des Keys
	//Verschiebung findet nur bei Buchstaben statt, alle anderen Zeichen bleiben unberücksichtigt
	private String decode(int key, String code) {

		char[] file = code.toCharArray();
		int i = 0;
		int temp;
		while (i < file.length) {
			if (file[i] >= 'a' && file[i] <= 'z') {
				if ((file[i] - key) < 'a') {
					temp = 'a' - (file[i] - key);
					file[i] = (char) (('z' + 1) - temp);
				} else {
					file[i] = (char) (file[i] - key);
				}
			} else if (file[i] >= 'A' && file[i] <= 'Z') {

				if ((file[i] - key) < 'A') {
					temp = 'A' - (file[i] - key);
					file[i] = (char) (('Z' + 1) - temp);
				} else {
					file[i] = (char) (file[i] - key);
				}
			}
			i++;
		}
		return String.valueOf(file);

	}

	//Datei wird mithilfe des BufferReaders ausgelesen und in die LinkedList geschrieben
	private void read(String datei) {
		BufferedReader in = null;
		String value = "";
		try {
			in = new BufferedReader(new InputStreamReader(new FileInputStream(
					datei)));
		} catch (FileNotFoundException e) {
			System.out.println(e.getMessage());
		}

		try {
			while (null != (value = in.readLine())) {
				_input.add(value);
			}
		} catch (IOException e) {
			System.out.println(e.getMessage());
		}

	}

	//LinkedList wird in ein File geschriebne und im Explorer abgespeichert
	private void write() {
		String text;
		BufferedWriter out = null;

		try {
			out = new BufferedWriter(new OutputStreamWriter(
					new FileOutputStream("encode.txt")));
			for (int i = 0; i < _input.size(); i++) {
				text = _input.get(i).toString();
				out.write(text, 0, text.length());
				out.newLine();
			}
		} catch (IOException ex) {
			System.out.println(ex);
		} finally {
			if (out != null)
				try {
					out.close();
				} catch (IOException e) {

					System.out.println(e.getMessage());
				}
		}
	}
        public static void letsroll ()
        {
            new Writer(cryptframe.key, "decode.txt");
        }
}

Danke für eure Hilfe!
 
G

Gast2

Gast
Wenn ich aber die JAR-Datei öffnen möchte, meldet er mir, dass die main-class nicht gefunden wurde.
Per Doppelklick?
Dann hast du deinen Code mit Java7 kompiliert, versuchst ihn aber mit Java6 auszuführen. Die Doppelklickverknüpfung ist falsch.

EDIT:
@Über mir:
Code:
java -jar "Pfad\letscryptit.jar"
setzt ein gültiges Manifest vorraus.
 

epitox

Mitglied
Per Doppelklick?
Dann hast du deinen Code mit Java7 kompiliert, versuchst ihn aber mit Java6 auszuführen. Die Doppelklickverknüpfung ist falsch.

EDIT:
@Über mir:
Code:
java -jar "Pfad\letscryptit.jar"
setzt ein gültiges Manifest vorraus.


Manifest-Datei:
Java:
Manifest-Version: 1.0
X-COMMENT: Main-Class will be added automatically by build

Ich hab die .jar-Dateien bisher immer via Doppelklick geöffnet und es hat bisher auch immer geklappt :D
 

X5-599

Top Contributor
Nur zur Sicherheit: Wie sieht denn die MANIFEST Datei des jars aus?

EDIT:

Extrahier mal die finale Manifest Datei aus dem jar.
 

epitox

Mitglied
Java:
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.3
Created-By: 1.7.0_01-b08 (Oracle Corporation)
Class-Path: 
X-COMMENT: Main-Class will be added automatically by build
Main-Class: cryptpackage.cryptframe
 
G

Gast2

Gast
Wie gesagt, das Manifest schaut gut aus. Der von dir angesprochene Fehler kommt genau dann wenn du nen Java7 Jar file mit Java6 starten willst.

Hast du vor kurzen mal auf Java7 aktualisiert?
 

epitox

Mitglied
Wie gesagt, das Manifest schaut gut aus. Der von dir angesprochene Fehler kommt genau dann wenn du nen Java7 Jar file mit Java6 starten willst.

Hast du vor kurzen mal auf Java7 aktualisiert?

Hab grad JRE7 Update 5 geladen und jetzt geht´s :oops:

Die Fehlermeldung könnte mir doch einfach sagen, dass ich die falsche Java-Version hab -.-
 
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H Scanner (can not find symbol) Java Basics - Anfänger-Themen 15
T Cannot find Symbol(String) Java Basics - Anfänger-Themen 9
2 Compiler-Fehler cannot find symbol Java Basics - Anfänger-Themen 13
B Erste Schritte cannot find symbol - problem Java Basics - Anfänger-Themen 9
D Cannot find symbol variable Java Basics - Anfänger-Themen 9
A Compiler-Fehler Cannot find Symbol Java Basics - Anfänger-Themen 6
V Packages: Cannot find symbol Java Basics - Anfänger-Themen 12
G Collections.binarySearch(LinkedList): cannot find method Java Basics - Anfänger-Themen 6
R Cannot find a free socket for the debugger Java Basics - Anfänger-Themen 6
J Cannot find Symbol Variable mit JPanels Java Basics - Anfänger-Themen 2
L Fehlermeldung: RealMirror.java cannot find symbol Java Basics - Anfänger-Themen 2
D Cannot Find Symbol Java Basics - Anfänger-Themen 6
M Compile Time Error - cannot find symbol (Objekt!) Java Basics - Anfänger-Themen 2
L Problem mit Vererbung (extends) cannot find symbol Java Basics - Anfänger-Themen 3
S Problem beim Kompilieren - cannot find symbol - constructor() Java Basics - Anfänger-Themen 12
N cannot find symbol URL Java Basics - Anfänger-Themen 2
S Problem mit Javaeditor: Cannot find Symbol Java Basics - Anfänger-Themen 13
P cannot find Symbol - WTF? Java Basics - Anfänger-Themen 4
R can not find symbol Java Basics - Anfänger-Themen 4
StupidAttack cannot find symbol Java Basics - Anfänger-Themen 16
B Cannot find symbol-Fehler Java Basics - Anfänger-Themen 3
Luk10 Cannot find Symbol Daten Java Basics - Anfänger-Themen 10
E cannot find symbol??? Java Basics - Anfänger-Themen 8
B cannot find symbol Java Basics - Anfänger-Themen 11
N cannot find symbol Java Basics - Anfänger-Themen 11
W Cannot find symbole variable Java Basics - Anfänger-Themen 4
T OOP cannot find symbol Java Basics - Anfänger-Themen 4
A cannot find symbol - symbol : method Java Basics - Anfänger-Themen 5
T cannot find symbol Java Basics - Anfänger-Themen 5
V Unable to find an ant file to run Java Basics - Anfänger-Themen 2
I Cannot find Symbol & NullPointerException Java Basics - Anfänger-Themen 8
A cannot find symbol. Java Basics - Anfänger-Themen 5
G cannot find symbol! Java Basics - Anfänger-Themen 22
K Ständige Fehlermeldung "Cannot find symbol" Java Basics - Anfänger-Themen 2
L cannot find symbol-method Java Basics - Anfänger-Themen 3
P Error: Cannot find Symbol Java Basics - Anfänger-Themen 4
G [Hibernate] Could not find a setter for property Java Basics - Anfänger-Themen 2

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