（執行緒二）interrupt、setPriority、join方法示例
例一：interrupt方法
public class ThreadDemo01 {
public static void main(String[] args) {
Thread t1=new Thread() {
public void run() {
System.out.println("t1開始");
try {
Thread.sleep(10000);
System.out.println("t1在睡覺");
} catch (InterruptedException e) {
e.printStackTrace();
System.out.println("t1睡覺被打斷");
}
}
};
Thread t2=new Thread() {
public void run() {
for(int i=0;i<5;i++) {
System.out.println("t2:砸牆，"+80*i);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
t1.interrupt();
}
};
t1.start();
t2.start();
}
}
執行結果：
t2:砸牆，0
t1開始
t2:砸牆，80
t2:砸牆，160
t2:砸牆，240
t2:砸牆，320
java.lang.InterruptedException: sleep interrupted
t1睡覺被打斷
at java.lang.Thread.sleep(Native Method)
at com.hyxy0915.ThreadDemo01$1.run(ThreadDemo01.java:8)
例二：執行緒setPriority方法測試說明
public class ThreadDemo03 {
public static void main(String[] args) {
Thread t1=new Thread() {
public void run() {
for(int i=0;i<10;i++) {
System.out.println("t1");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
};
}
}
};
Thread t2=new Thread() {
public void run() {
for(int i=0;i<10;i++) {
System.out.println("t2");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
};
}
}
};
Thread t3=new Thread() {
public void run() {
for(int i=0;i<10;i++) {
System.out.println("t3");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
};
}
}
};
t2.setPriority(Thread.MAX_PRIORITY);
t3.setPriority(Thread.MIN_PRIORITY);
t1.start();
t2.start();
t3.start();
}
}
public class ThreadDemo03 {
public static void main(String[] args) {
Thread t1=new Thread() {
public void run() {
for(int i=0;i<10;i++) {
System.out.println("t1");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
};
}
}
};
Thread t2=new Thread() {
public void run() {
for(int i=0;i<10;i++) {
System.out.println("t2");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
};
}
}
};
Thread t3=new Thread() {
public void run() {
for(int i=0;i<10;i++) {
System.out.println("t3");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
};
}
}
};
t2.setPriority(Thread.MAX_PRIORITY);
t3.setPriority(Thread.MIN_PRIORITY);
t1.start();
t2.start();
t3.start();
}
}
執行結果：從結果可以看出t1、t2、t3並非按照所設定優先順序進行輸出，可見，理論上來說執行緒可以設定優先順序，可是cpu是不可控的，所以優先順序僅僅只是在理論上，並非是一定按照我們所設定優先順序進行cpu排程
例三：join方法示例
public class ThreadDemo04 {
private static int sum=0;
public static void main(String[] args) {
Thread t1=new Thread() {
public void run() {
for(int i=0;i<=100;i++) {
sum+=i;
}
}
};
Thread t2=new Thread() {
public void run() {
try {
t1.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(sum);
}
};
t1.setPriority(Thread.MAX_PRIORITY);
t1.start();
t2.start();
}
}
public class ThreadDemo04 {
private static int sum=0;
public static void main(String[] args) {
Thread t1=new Thread() {
public void run() {
for(int i=0;i<=100;i++) {
sum+=i;
}
}
};
Thread t2=new Thread() {
public void run() {
try {
t1.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(sum);
}
};
t1.setPriority(Thread.MAX_PRIORITY);
t1.start();
t2.start();
}
}
輸出結果：5050
無論執行多少次結果都為5050，所以我們由此可知是t1執行緒執行結束後t2才開始執行