java例程練習(多執行緒[執行緒的優先順序等等])
阿新 • • 發佈:2019-02-12
//設定執行緒的優先順序 public class TestThread1 { public static void main(String[] args) { Thread t1 = new Thread(new T1()); Thread t2 = new Thread(new T2()); t1.setPriority(Thread.NORM_PRIORITY + 3); t1.start(); t2.start(); } } class T1 implements Runnable { public void run() { for(int i = 0; i < 1000; i++) { System.out.println("--------T1: " + i); } } } class T2 implements Runnable { public void run() { for(int i = 0; i < 1000; i++) { System.out.println("========T2: " + i); } } }
//同樣的執行緒物件可以用來起多個執行緒 public class TestThread2 { public static void main(String[] args) { Runner2 r = new Runner2(); Thread t1 = new Thread(r); Thread t2 = new Thread(r); t1.start(); t2.start(); } } class Runner2 implements Runnable { public void run() { for(int i = 0; i < 30; i++) { System.out.println("NO. " + i); } } }
//sleep()方法 public class TestThread3 { public static void main(String[] args) { Runner3 r = new Runner3(); Thread t = new Thread(r); t.start(); } } class Runner3 implements Runnable { public void run() { for(int i = 0; i < 30; i++) { if(i % 10 == 0 && i != 10) { try { Thread.sleep(1000); } catch(InterruptedException e) {} System.out.println("NO. " + i); } } } }
public class TestThread4 {
public static void main(String[] args) {
Runner4 r = new Runner4();
Thread t = new Thread(r);
t.start();
for(int i = 0; i < 100000; i++) {
if(i % 1000 == 0 & i > 0) {
System.out.println("In Thread main i = " + i);
}
}
System.out.println("Thread Main is Over");
r.shutDown();
}
}
class Runner4 implements Runnable {
private boolean flag = true;//最好的使執行緒終止的方法
public void run() {
int i = 0;
while(flag == true) {
System.out.print(" " + i++);
}
}
public void shutDown() {
flag = false;
}
}
//複習join()方法;
public class TestThread5 {
public static void main(String[] args) {
Runner5 r = new Runner5();
Thread t = new Thread(r);
t.start();
try {
t.join();
} catch(InterruptedException e) {}
for(int i = 0; i < 50; i ++) {
System.out.println("MainThread: " + i);
}
}
}
class Runner5 implements Runnable {
public void run() {
for(int i = 0; i < 50; i++) {
System.out.println("SubThread: " + i);
}
}
}
public class TestThread6 {
public static void main(String[] args) {
Thread t = new Runner6();
t.start();
for(int i = 0; i < 50; i++) {
System.out.println("MainThread: " + i);
}
}
}
class Runner6 extends Thread {
public void run() {
//拿到當前執行緒判斷是不是還活著Thread.currentThread(),isAlive()
System.out.println(Thread.currentThread().isAlive());
for(int i = 0; i < 50; i++) {
System.out.println("SubThread: " + i);
}
}
}