初始化

package jvm;

class singleton {

public static singleton singleton = new singleton();

public static int a;

public static int b = 0;

private singleton(){

super();

a++;

b++;

}

public static singleton getinstance(){

return singleton;

public class testsingleton{

public static void main(string[] args) {

singleton s = singleton.getinstance();

system.out.println(s.a);

system.out.println(s.b);

程式輸出：

1