public class SimpleThread extends Thread {
private int countDown = 5;
private int threadNumber;
private static int threadCount = 0;
public SimpleThread() {
threadNumber = ++threadCount;
System.out.println("Making " + threadNumber);
}
public void run() {
while(true) {
System.out.println("Thread " +
threadNumber + "(" + countDown + ")");
if(--countDown == 0) return;
}
}
public static void main(String[] args) {
for(int i = 0; i < 5; i++)
new SimpleThread().start();
System.out.println("All Threads Started");
}
} ///:~Making 1
Making 2
Making 3
Making 4
Making 5
Thread 1(5)
Thread 1(4)
Thread 1(3)
Thread 1(2)
Thread 2(5)
Thread 2(4)
Thread 2(3)
Thread 2(2)
Thread 2(1)
Thread 1(1)
All Threads Started
Thread 3(5)
Thread 4(5)
Thread 4(4)
Thread 4(3)
Thread 4(2)
Thread 4(1)
Thread 5(5)
Thread 5(4)
Thread 5(3)
Thread 5(2)
Thread 5(1)
Thread 3(4)
Thread 3(3)
Thread 3(2)
Thread 3(1)
这是一个海菜的问题。但我刚学就得问:它是怎样输出结果的啊 ???为什么先输出的是Making 2
Making 3
Making 4
Making 5
这个啊 ,???
private int countDown = 5;
private int threadNumber;
private static int threadCount = 0;
public SimpleThread() {
threadNumber = ++threadCount;
System.out.println("Making " + threadNumber);
}
public void run() {
while(true) {
System.out.println("Thread " +
threadNumber + "(" + countDown + ")");
if(--countDown == 0) return;
}
}
public static void main(String[] args) {
for(int i = 0; i < 5; i++)
new SimpleThread().start();
System.out.println("All Threads Started");
}
} ///:~Making 1
Making 2
Making 3
Making 4
Making 5
Thread 1(5)
Thread 1(4)
Thread 1(3)
Thread 1(2)
Thread 2(5)
Thread 2(4)
Thread 2(3)
Thread 2(2)
Thread 2(1)
Thread 1(1)
All Threads Started
Thread 3(5)
Thread 4(5)
Thread 4(4)
Thread 4(3)
Thread 4(2)
Thread 4(1)
Thread 5(5)
Thread 5(4)
Thread 5(3)
Thread 5(2)
Thread 5(1)
Thread 3(4)
Thread 3(3)
Thread 3(2)
Thread 3(1)
这是一个海菜的问题。但我刚学就得问:它是怎样输出结果的啊 ???为什么先输出的是Making 2
Making 3
Making 4
Making 5
这个啊 ,???
构造方法,你循环创建了5个 对象,首先 第一次循环 创建第一个对象时,调用 构造器,并执行构造方法中的语句,依次下去,这样当然
Making 1
Making 2
Making 3
Making 4
Making 5 就先执行了。