多线程小知识
Posted windzly
tags:
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package test;
import java.awt.List;
import java.awt.image.AreaAveragingScaleFilter;
import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.io.BufferedInputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Writer;
import javax.security.auth.callback.LanguageCallback;
import javax.swing.text.StyledEditorKit.BoldAction;
class Re implements Runnable
{
@Override
public void run() {
// TODO Auto-generated method stub
for(int i = 1; i <= 50; i ++)
{
System.out.println(Thread.currentThread().toString() + "........" + i);
}
}
}
public class Main {
public static void main(String[] args) throws Exception {
Scanner scanner = new Scanner(new BufferedInputStream(System.in));
PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
new Thread(new Runnable() {
@Override
public void run() {
System.out.println(11);
}
})
{
public void run() {
for(int i = 1; i <= 50; i ++)
{
System.out.println(Thread.currentThread().getName() + " .......");
}
}
}.start();
}
}
我们在一个线程里面先运行子任务，若是没有子任务就运行自己的任务，自己要是没有任务就运行thread
我们在线程里面t1.setDaemon(true);我们可以设置后台任务，后台任务的好处就是在前台任务结束之后java虚拟机就会退出
我们还可以t1.yield();让这个线程释放执行权
t1.setPriority(Thread.MAX_PRIORITY);这个我们可以让线程的优先级变高 cpu适当照顾一下线程
t1.interrupt();打断线程，这个东西我们需要抛出异常
package test;
import java.awt.List;
import java.awt.image.AreaAveragingScaleFilter;
import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.*;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.io.BufferedInputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.Writer;
import javax.security.auth.callback.LanguageCallback;
import javax.swing.text.StyledEditorKit.BoldAction;
class Re implements Runnable
{
@Override
public void run() {
// TODO Auto-generated method stub
for(int i = 1; i <= 50; i ++)
{
System.out.println(Thread.currentThread().toString() + "........" + i);
}
}
}
public class Main {
public static void main(String[] args) throws Exception {
Scanner scanner = new Scanner(new BufferedInputStream(System.in));
PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
new Thread(new Runnable() {
@Override
public void run() {
System.out.println(11);
}
})
{
public void run() {
for(int i = 1; i <= 50; i ++)
{
System.out.println(Thread.currentThread().getName() + " .......");
}
}
}.start();
Thread t1 = new Thread();
t1.setDaemon(true);
t1.yield();
t1.setPriority(Thread.MAX_PRIORITY);
t1.interrupt();
}
}
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