Taschenrechner - Additions/Substraktions/Multiplikations/Divionsketten!

[Zitrus]

Hallo bin gerade am Taschenrechner programmieren und sogut wie fertig
Hier mal mein Code:

package rechner;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class Rechner
{
    public static void main (String[] args)
    {
      CalculatorFrame frame = new CalculatorFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
    }
}
    
class CalculatorFrame extends JFrame
     {
     public CalculatorFrame()
     {
        setLayout(new BorderLayout());
        setResizable(false);
        setSize(250,215);
        setTitle ("Saltuks Rechner");
        setLocation(100,100);
        CalculatorPanel hpanel = new CalculatorPanel();
        add(hpanel);
    }
}
        
class CalculatorPanel extends JPanel implements ActionListener
{
private JTextArea field;
private JPanel panel;
private JTextArea field2;
     public CalculatorPanel() {
        setLayout(null);
        field = new JTextArea();
        field.setBounds (10,10,225,40);
        field.setEditable(false);
        field.setVisible(true);
        field2 = new JTextArea();
        field2.setBounds (10,10,225,40);
        field2.setEditable(false);
        field2.setVisible(true);
        
        
        panel = new JPanel();
        panel.setLayout(null);
        panel.setSize(300,300);
        
        addButton0();
        addButton1();
        addButton2();
        addButton3();
        addbuttonplus();
        addbutton4();
        addbutton5();
        addbutton6();
        addbuttonminus();
        addbutton7();
        addbutton8();
        addbutton9();
        addbuttonmal();
        addbuttondurch();
        addbuttonpkt();
        addbuttongleich();
        addbuttonlösch();
        addbuttonlösch1();
        
        add(field, BorderLayout.NORTH);
        add(field2, BorderLayout.NORTH);
        add(panel, BorderLayout.CENTER);
        
        
     }
     
     JButton button0 = new JButton("0");
     JButton button1 = new JButton("1");
     JButton button2 = new JButton("2");
     JButton button3 = new JButton("3");
     JButton buttonplus = new JButton("+");
     JButton button4 = new JButton("4");
     JButton button5 = new JButton("5");
     JButton button6 = new JButton("6");
     JButton buttonminus = new JButton("*");
     JButton button7 = new JButton("7");
     JButton button8 = new JButton("8");
     JButton button9 = new JButton("9");
     JButton buttonmal = new JButton("x");
     JButton buttondurch = new JButton("/");
     JButton buttonpkt = new JButton(".");
	 JButton buttongleich = new JButton("=");
	 JButton buttonlösch = new JButton("C");
	 JButton buttonlösch1 = new JButton("E");
	 
	 private void addButton0()
     {
      button0.addActionListener(this);
      button0.setBounds(10,150,45,30);
      panel.add(button0);
      setFont(new Font("Agency FB Regular", 5, 3));
     }
     private void addButton1()
     {
      button1.addActionListener(this);
      button1.setBounds(10,60,45,30);
      panel.add(button1);
      setFont(new Font("Agency FB Regular", 5, 3));
     }
     
     private void addButton2()
     {
      button2.setBounds(55,60,45,30);
      button2.addActionListener(this);
      panel.add(button2);
      setFont(new Font("Arial", 5, 3));
     }
     
     private void addButton3()
     {
      button3.setBounds(100,60,45,30);
      button3.addActionListener(this);
      panel.add(button3);
      setFont(new Font("Agency FB Regular", 5, 3));
     }
     
     private void addbuttonplus()
     {
      buttonplus.setBounds(145,60,45,30);
      buttonplus.addActionListener(this);
      panel.add(buttonplus);
      setFont(new Font("Agency FB Regular", 5, 3));
     }
     
     private void addbutton4()
     {
      button4.setBounds(10,90,45,30);
      button4.addActionListener(this);
      panel.add(button4);
     }
     
     private void addbutton5()
     {
      button5.setBounds(55,90,45,30);
      button5.addActionListener(this);
      panel.add(button5);
     }
     
     private void addbutton6()
     {
      button6.setBounds(100,90,45,30);
      button6.addActionListener(this);
      panel.add(button6);
     }
     
     private void addbuttonminus()
     {
      buttonminus.setBounds(190,60,45,30);
      buttonminus.addActionListener(this);
      panel.add(buttonminus);
     }
     
     private void addbutton7()
     {
      button7.setBounds(10,120,45,30);
      button7.addActionListener(this);
      panel.add(button7);
     }
     
     private void addbutton8()
     {
      button8.setBounds(55,120,45,30);
      button8.addActionListener(this);
      panel.add(button8);
     }
     
     private void addbutton9()
     {
      button9.setBounds(100,120,45,30);
      button9.addActionListener(this);
      panel.add(button9);
     }
     
     private void addbuttonmal()
     {
      buttonmal.setBounds(145,90,45,30);
      buttonmal.addActionListener(this);
      panel.add(buttonmal);
     }
     
     private void addbuttondurch()
     {
      buttondurch.setBounds(190,90,45,30);
      buttondurch.addActionListener(this);
      panel.add(buttondurch);
     }
     
     private void addbuttonpkt()
     {
      buttonpkt.setBounds(145,120,45,30);
      buttonpkt.addActionListener(this);
      panel.add(buttonpkt);
     }
     
     private void addbuttongleich()
     {
       buttongleich.setBounds(55,150,135,30);
       buttongleich.addActionListener(this);
       panel.add(buttongleich);
     }
     private void addbuttonlösch()
     {
         buttonlösch.setBounds(190,120,45,30);
         buttonlösch.addActionListener(this);
         panel.add(buttonlösch);        
     }
     private void addbuttonlösch1()
     {
         buttonlösch1.setBounds(190,150,45,30);
         buttonlösch1.addActionListener(this);
         panel.add(buttonlösch1);
     }
         
     public void actionPerformed (ActionEvent ae){
         
         String i = field.getText();
         int counterP = 1;
         int counterD = 1;
         int counterM = 1;
         int counterMi = 1;
         for (int a = 0; a < i.length(); a++) {
			 if(i.charAt(a) == '*') counterMi++;
		 }
         for (int a = 0; a < i.length(); a++) {
			 if(i.charAt(a) == '+') counterP++;
		 }
         for (int a = 0; a < i.length(); a++) {
			 if(i.charAt(a) == 'x') counterM++;
		 }
         for (int a = 0; a < i.length(); a++) {
			 if(i.charAt(a) == '/') counterD++;
		 }
         
         if(ae.getSource() == this.button0){
             field.setText(field.getText() + "0");
    	 }
    	 if(ae.getSource() == this.button1){
             field.setText(field.getText() + "1");
    	 }
    	 if(ae.getSource() == this.button2) {	
    		 field.setText(field.getText() + "2");
    	 }
    	 if(ae.getSource() == this.button3) {	
    		 field.setText(field.getText() + "3");
    	 }  
         
    	 if(ae.getSource() == this.buttonplus) {
            field.setText(field.getText() + "+");
            if(counterP == 2) {
            	String[] parts = i.split("\\+");
       		    String part1 = parts[0];
       		    String part2 = parts[1];
            	
            	double d1 = Double.parseDouble(part1);
       		    double d2 = Double.parseDouble(part2);
      		 
       		    double res = d1+d2;
       		    
       		    field.setText(String.valueOf(res) + "+");
            }
         }    	 
    	 if(ae.getSource() == this.button4) {	
    		 field.setText(field.getText() + "4");
    	 }
    	 if(ae.getSource() == this.button5) {
    		 field.setText(field.getText() + "5");	 
    	 }
    	 if(ae.getSource() == this.button6) {
    		 field.setText(field.getText() + "6");
    	 }
    	 if(ae.getSource() == this.buttonminus) {
             field.setText(field.getText() + "*");
             if(counterMi == 2) {
             	    String[] parts = i.split("\\*");
        		    String part1 = parts[0];
        		    String part2 = parts[1];
             	
             	    double d1 = Double.parseDouble(part1);
        		    double d2 = Double.parseDouble(part2);
       		 
        		    double res = d1-d2;
        		    
        		    field.setText(String.valueOf(res) + "*");
             }
          }
    	 if(ae.getSource() == this.button7) {
    		 field.setText(field.getText() + "7");
    	 }
    	 if(ae.getSource() == this.button8) {
    		 field.setText(field.getText() + "8");
    	 }
    	 if(ae.getSource() == this.button9) {
    		 field.setText(field.getText() + "9");
    	 }
         if(ae.getSource() == this.buttonmal) {
                 field.setText(field.getText() + "x");
                 if(counterM == 2) {
                 	    String[] parts = i.split("x");
            		    String part1 = parts[0];
            		    String part2 = parts[1];
                 	
                 	    double d1 = Double.parseDouble(part1);
            		    double d2 = Double.parseDouble(part2);
           		 
            		    double res = d1*d2;
            		    
            		    field.setText(String.valueOf(res) +  "x");
                 }
              }
    	 if(ae.getSource() == this.buttondurch) {
    		 field.setText(field.getText() + "/");
             if(counterD == 2) {
             	    String[] parts = i.split("\\/");
        		    String part1 = parts[0];
        		    String part2 = parts[1];
             	
             	    double d1 = Double.parseDouble(part1);
        		    double d2 = Double.parseDouble(part2);
       		 
        		    double res = d1/d2;
        		    
        		    field.setText(String.valueOf(res) +  "");
             }
          }
    	 if(ae.getSource() == this.buttonpkt) {
    		 field.setText(field.getText() + ".");
    	 } 
         if(ae.getSource() == this.buttonlösch) {
        		 field.setText("");	 
    	 }      
         if (ae.getSource() == this.buttonlösch1) {  
        	 field.setText(i.substring(0, i.length()-1));
         }
    	 if(ae.getSource() == this.buttongleich) {  
    		 
    		 if(i.contains("+")) {
    		    String[] parts = i.split("\\+");
    		    String part1 = parts[0];
    		    String part2 = parts[1];


    		    double d1 = Double.parseDouble(part1);
    		    double d2 = Double.parseDouble(part2);
   		 
    		    double res = d1+d2;
    		 
    		    String result = String.valueOf(res);
    		    field.setText(result);
    		 }
    		 
    		 if(i.contains("*")) {
        	    	 String[] parts = i.split("\\*");
            		 String part1 = parts[0];
            		 String part2 = parts[1];


            		 double d1 = Double.parseDouble(part1);
            		 double d2 = Double.parseDouble(part2);
           		 
            		 double res = d1-d2;
            		 
            		 String result = String.valueOf(res);
            		 field.setText(result);

        	     }
    		 
    		 if(i.contains("x")) {
        	    	 String[] parts = i.split("x");
        	    	 String part1 = parts[0];
            		 String part2 = parts[1];
    			 
            		 double d1 = Double.parseDouble(part1);
            		 double d2 = Double.parseDouble(part2);
           		 
            		 double res = d1*d2;

            		 String result = String.valueOf(res);
            		 field.setText(result);
        	     }
    		 
    		 if(i.contains("/"))  {
            		 String[] parts = i.split("\\/");
            		 String part1 = parts[0];
            		 String part2 = parts[1];
            		 
            		 double d1 = Double.parseDouble(part1);
            		 double d2 = Double.parseDouble(part2);
            		 
            		 double res = d1/d2;
            		 
            		 String result = String.valueOf(res);
            		 field.setText(result);
    	 }
    		 
         }	 
     }
}

Meine Frage ist nun wie ich es hinbekomme, dass Rechnungen wie 1+1-1 funktionieren. Ich möchte das auf dieselbe Weise wie bishere lösen also wenn ich 1+1- eingebe wird das 1+1 ausgerechnet und dahinter das eingegebene Rechenzeichen gesetzt also 2-
Ich hoffe das war soweit verständlich

Mfg, Zitrus

 

[Gucky]

Du teilst die eingegebene Rechnung gemäß den Rechenregeln in einzelne Terme auf oder was meinst du?

2- ist ein mathematisch nicht korrekter Ausdruck. Was bezweckst du damit?

 

[Zitrus]

Thread kann geschlossen werden!

 

[JavaMeister]

Wenn du eine Lösung gefunden hast, dann poste sie hier. Es hilft anderen Suchenden und du kannst nachsehen, wenn du sie vergessen hast.

 

[Gucky]

Außerdem ist vollkommene Ignoranz gegen die, die dir schon geholfen haben kein Mittel, um diese Personen dazu zu bewegen, dir auch weiterhin zu helfen.