J2ME平台A-RPG游戏怪物寻路算法初探
class Singleton {
private static Singleton obj = new Singleton();
public static int counter1;
public static int counter2 = 0;
private Singleton() {
counter1++;
counter2++;
System.out.println("constructor counter2's value :"+counter2);
}
public static Singleton getInstance() {
System.out.println("getInstance counter2's value :"+counter2);
return obj;
}
}
public class MyMain {
@SuppressWarnings("static-access")
public static void main(String[] args) {
Singleton obj = Singleton.getInstance();
System.out.println("obj.counter1=" + obj.counter1);
System.out.println("obj.counter2=" + obj.counter2);
Singleton obj1 = Singleton.getInstance();
System.out.println("obj1.counter1=" + obj1.counter1);
System.out.println("obj1.counter2=" + obj1.counter2);
}
}
输出结果是：
obj.counter1=1
obj.counter2=0
obj1.counter1=1
obj1.counter2=0
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