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35 lines
873 B
35 lines
873 B
package com.msb.singleton;
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import java.util.Objects;
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/**
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* @Author bingor
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* @Date 2022-10-06 10:25
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* @Description:
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* 静态内部类方式
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* JVM保证单例
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* 加载外部类时不会加载内部类，这样可以实现懒加载
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* @Version: 1.0
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*/
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public class Singleton07 {
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private Singleton07() {}
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private static class Singleton07Holder {
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private static final Singleton07 INSTANCE = new Singleton07();
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}
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public static Singleton07 getInstance() {
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return Singleton07Holder.INSTANCE;
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}
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public static void main(String[] args) {
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for (int i=0; i<100; i++) {
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new Thread(() -> { //同样的哈希码，可能是不同的对象。但不同的对象，有不同的哈希码
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System.out.println(Singleton07.getInstance().hashCode());
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}).start();
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}
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}
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}
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