熟悉eclipse编程的大哥帮帮忙

package pack;

public class caipiao {

/**
* @param args
*/
public static void main(String[] args) {
int a[] = new int[5];
int c = 0;
for (int i = 0; i < 5; i++) {
int b = (int) (Math.random() * 100);
b = b % 22 + 1;
for (int n = 0; n < i; n++) {
if (a[n] == b) {
c++;
}
}
if (c == 1) {
i -= 1;
c = 0;
} else {
a[i] = b;
}

}
for (int i = 0; i < 5; i++) {
System.out.println(a[i]);
}
}

}

这个行不？JRE1。5以上
import java.util.ArrayList;
import java.util.Random;

public class Lott {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Random rnd = new Random();
ArrayList<Integer> balls = new ArrayList<Integer>();
int x;