实例1：
package com.bijian.thread;
public class MyThread extends Thread {
private static ThreadLocal tl = new ThreadLocal() {
protected synchronized Object initialValue() {
return new Integer(sernum++);
}
};
private static int sernum = 100;
MyThread(String name) {
super(name);
}
public void run() {
for (int i = 0; i < 5; i++)
System.out.println(getName() + " " + tl.get());
}
}
package com.bijian.thread;
public class ThreadLocalDemo1 {
public static void main(String[] args) {
MyThread mt1 = new MyThread("A");
MyThread mt2 = new MyThread("B");
MyThread mt3 = new MyThread("C");
mt1.start();
mt2.start();
mt3.start();
}
}
运行结果：
C 101 A 100 B 102 A 100 C 101 A 100 B 102 A 100 C 101 A 100 B 102 C 101 B 102 C 101 B 102
实例2：
package com.bijian.thread;
public class MyThread extends Thread {
private static ThreadLocal tl = new ThreadLocal();
private static int sernum = 100;
MyThread(String name) {
super(name);
}
public void run() {
synchronized ("A") {
tl.set("" + sernum++);
}
for (int i = 0; i < 10; i++)
System.out.println(getName() + " " + tl.get());
}
}
package com.bijian.thread;
public class ThreadLocalDemo2 {
public static void main(String[] args) {
MyThread mt1 = new MyThread("A");
MyThread mt2 = new MyThread("B");
MyThread mt3 = new MyThread("C");
mt1.start();
mt2.start();
mt3.start();
}
}
运行结果：
A 100 B 101 A 100 C 102 A 100 B 101 A 100 C 102 A 100 B 101 C 102 B 101 C 102 B 101 C 102