能给我一个多线程的例子么

Question

要简单易懂的。

Answer 1

public class  TestPressure
{
static int pressureGuage = 0;
final static int safetyLimit = 40; public static void main(String[] args) 
{
TestPressure testpressure = new TestPressure();
Pressure[] p =  new Pressure[10];
for(int i=0;i<10;i++){
p[i] = new Pressure(testpressure);
p[i].start();
}
try{
for(int i=0;i<10;i++){
p[i].join();
}
}catch(Exception e){
}

System.out.println("pressureGuage is:"+pressureGuage+" pressure limit is:"+safetyLimit);
}
}class Pressure extends Thread
{
private static Object obj = new Object();
private TestPressure testpressure;
public Pressure(TestPressure testpressure){
this.testpressure = testpressure;
}

public void raisePressure(){
synchronized(obj){ 
if(TestPressure.pressureGuage<(TestPressure.safetyLimit-15)){
try{
sleep(1000);
}catch(Exception e){
}
TestPressure.pressureGuage += 15;
}else{
}
}
} public void run(){
raisePressure();
}
}