Code:
public String doStuff(String s1, String s2) {
String result = "";
for(int i = 0; i < s1.length (); i++) {
char c = s1.charAt(i);
if(s2.indexOf(c) != -1 && result.indexOf(c) == -1) {
result += c;
}
}
return result;
}
vg
public String doStuff(String s1, String s2) {
String result = "";
for(int i = 0; i < s1.length (); i++) {
char c = s1.charAt(i);
if(s2.indexOf(c) != -1 && result.indexOf(c) == -1) {
result += c;
}
}
return result;
}
indexOf
der Klasse String durch