array di java

import javax.swing.JOptionPane;
import javax.swing.JTextArea;
public class hitung_array {
public static void main(String[]args){
int array[]=new int[20];
int x=0;
int jum=0;
float rata2;
int total=0;
String i;
String output;
i=JOptionPane.showInputDialog("masukan nilai array:");
array[x]=Integer.parseInt(i);
while(array[x]!=0&&jum {
jum=jum+1;
total=total+array[x];
i=JOptionPane.showInputDialog("masukan nilai array:");
array[x]=Integer.parseInt(i);
}
rata2=(float)total/jum;
output="total nilai array adalah:"+total+"\nRata-rata nilai array:"+rata2+"\n";
JTextArea outputArea=new JTextArea();
outputArea.setText(output);
JOptionPane.showMessageDialog(null, output);

}
}