单例模式
Posted liushisaonian
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了单例模式相关的知识，希望对你有一定的参考价值。
1. 单例模式恶汉式
package com.ithuanyu;
public class SingletonE {
static SingletonE singeltonE = new SingletonE();
private SingletonE() {
}
public static SingletonE getSingletonE() {
return singeltonE;
}
}
2.懒汉式
public class Singleton {
private Singleton() {
}
//懒汉式
static Singleton singleton = null;
public static Singleton getSingeton() {
if (singleton == null) {
synchronized (Singleton.class) {
if (singleton == null) {
singleton = new Singleton();
}
}
}
return singleton;
}
public static void main(String[] args) {
Thread t1 = new Thread(new Runnable() {
@Override
public void run() {
Singleton singeton = Singleton.getSingeton();
System.err.println(singeton);
}
});
Thread t2 = new Thread(new Runnable() {
@Override
public void run() {
Singleton singeton = Singleton.getSingeton();
System.err.println(singeton);
}
});
Thread t3 = new Thread(new Runnable() {
@Override
public void run() {
Singleton singeton = Singleton.getSingeton();
System.err.println(singeton);
}
});
Thread t4 = new Thread(new Runnable() {
@Override
public void run() {
Singleton singeton = Singleton.getSingeton();
System.err.println(singeton);
}
});
Thread t5 = new Thread(new Runnable() {
@Override
public void run() {
Singleton singeton = Singleton.getSingeton();
System.err.println(singeton);
}
});
t1.start();
t2.start();
t3.start();
t4.start();
t5.start();
}
}
以上是关于单例模式的主要内容，如果未能解决你的问题，请参考以下文章