public void getAllSub(String str) {

Set<String> result = new HashSet<String>();

int length = str.length();

int maxlength = length/2;

for (int i = 1; i <= maxlength; i++) {

for (int j = 0; j+i < length; j++) {

String target = str.substring(j, j+i);

String after = str.replaceAll(target, "");

if(length > (after.length()+target.length())){

result.add(target);

}

}

}

for (String string : result) {

System.out.println(string);

}

}