java.lang.NumberFormatException when clicking button

Question

im am writing a java program of a frame that the user enters a list of numbers, in JTextFields and be stored in array elements, and when button is preseed its going to sort the arrae and set it in another JText field

the problem is that when i click the button it gives an exception

thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: ""
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
    at java.lang.Integer.parseInt(Integer.java:592)
    at java.lang.Integer.parseInt(Integer.java:615)
    at Array.actionPerformed(Array.java:92)

knowing that the actionPerformed method has the following code

public void actionPerformed(ActionEvent e){
        String s1= e.getActionCommand(); 
        if(s1.equals("Sort")){
            int[] a = new int[ 6]; 
            String ti1 = t1.getText();
            String ti2 = t2.getText();
            String ti3 = t3.getText();
            String ti4 = t4.getText();
            String ti5 = t5.getText();
            String ti6 = t6.getText();

            a[0] = Integer.parseInt(ti1); 
            a[1] = Integer.parseInt(ti2); 
            a[2] = Integer.parseInt(ti3); 
            a[3] = Integer.parseInt(ti4); 
            a[4] = Integer.parseInt(ti5); 
            a[5] = Integer.parseInt(ti6); 

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

            for(int j = 0; j<a.length-1;j++){ 
                if(a[j]>a[j+1]){
                    int temp = a[j];
                    a[j]=a[j+1];
                    a[j+1]=temp; 
                }

                }
            }
            t7.setText(Integer.toString(a[0]));
            t8.setText(Integer.toString(a[1]));
            t9.setText(Integer.toString(a[2]));
            t10.setText(Integer.toString(a[3]));
            t11.setText(Integer.toString(a[4]));
            t12.setText(Integer.toString(a[5]));

Java can't turn the empty string into a number, as the exception states. — Frontear
– Frontear, Commented Dec 3, 2019 at 15:33
Possible duplicate of stackoverflow.com/questions/8780962/… — gkrthk
– gkrthk, Commented Dec 3, 2019 at 15:42
the stacktrace tells you the line in which the error occurs (at Array.actionPerformed(Array.java:92)), which is likely one of the a[X] = Integer.parseInt(tiX); lines. Check why that tiX is empty. — f1sh
– f1sh, Commented Dec 3, 2019 at 15:42
What's the type of t<n> variables ? How are they initialized ? — Benoit
– Benoit, Commented Dec 3, 2019 at 15:44

Mariam Labbad · Accepted Answer · 2019-12-03 15:54:49Z

0

I figured out the problem!! i aded the same JTextField object twice to the frame, rather than adding t1 and t10 ive added t1 twice thats why t10 was empty when i tried to use it

answered Dec 3, 2019 at 15:54

Mariam Labbad

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