标签：SingleTon java 虚拟机 singleTon counter1 深入 static public counter2
package com.ygl;
class SingleTon{
private static SingleTon singleTon=new SingleTon();
public static int counter1;
public static int counter2=0;
public SingleTon(){
counter1++;
counter2++;
}
public static SingleTon getInstance(){
return singleTon;
}
}
public class MyTest {
public static void main(String[] args) {
SingleTon singleTon=SingleTon.getInstance();//触发类加载，先为静态变量分配内存（以及默认初始值，执行=左边），后赋值，执行=右边
System.out.println("counter1="+singleTon.counter1);
System.out.println("counter1="+singleTon.counter2);
}
}
//******************************************
counter1=1
counter1=0//*********************************************
class SingleTon{
public static int counter1;
public static int counter2=0;
private static SingleTon singleTon=new SingleTon();
public SingleTon(){
counter1++;
counter2++;
}
public static SingleTon getInstance(){
return singleTon;
}
}
public class MyTest {
public static void main(String[] args) {
SingleTon singleTon=SingleTon.getInstance();
System.out.println("counter1="+singleTon.counter1);
System.out.println("counter1="+singleTon.counter2);
}}
//******************************************************
counter1=1
counter1=1
标签：SingleTon,
java,
虚拟机,
singleTon,
counter1,
深入,
static,
public,
counter2
From： https://blog.51cto.com/u_10028442/5824678