線程死鎖就是線程之前相互爭奪對放所擁有的資源,並且不釋放資源,這樣下去就會造成死鎖。(個人見解)
package cn.sp.test02;
/**
*
* @author 2YSP
*線程死鎖問題
*/
public class TestDeadLock {
//是指不同的線程分別佔用對方需要的同步資源不放棄,都再等待對方放棄自己需要的同步資源,就形成了線程的死鎖
static StringBuffer sb1=new StringBuffer();
static StringBuffer sb2=new StringBuffer();
public static void main(String[] args) {
new Thread(){
public void run(){
synchronized (sb1) {
try {
Thread.currentThread().sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
sb1.append("A");
synchronized (sb2) {
sb2.append("B");
System.out.println(sb1);
System.out.println(sb2);
}
}
}
}.start();
new Thread(){
public void run(){
synchronized (sb2) {
sb1.append("C");
synchronized (sb1) {
sb2.append("D");
System.out.println(sb1);
System.out.println(sb2);
}
}
}
}.start();
}
}