没有加入join
package Week8;
public class ThreadJoin extends Thread {
private static int[] arr = new int[5];
public void run(){
for(int i = 0; i<5;i++){
System.out.println("正在运行线程");
}
}
public static void main(String[] args) {
ThreadJoin a = new ThreadJoin();
InviArr(5);//初始化数组
a.start();
// try{
// a.join();
// }catch(InterruptedException e){
// e.printStackTrace();
// }
PrintArr();
}
private static void PrintArr() {
int i = 0 ;
for(int n:arr)
System.out.print("\nPrintArr a["+i+++"]="+n);
}
private static void InviArr( int n) {
int i=0;
while(i<n)
arr[i++]=(int)(Math.random()*1000);
}
}
运行结果为
加入join方法
package Week8;
public class ThreadJoin extends Thread {
private static int[] arr = new int[5];
public void run(){
for(int i = 0; i<5;i++){
System.out.println("正在运行线程");
}
}
public static void main(String[] args) {
ThreadJoin a = new ThreadJoin();
InviArr(5);//初始化数组
a.start();
try{
a.join();
}catch(InterruptedException e){
e.printStackTrace();
}
PrintArr();
}
private static void PrintArr() {
int i = 0 ;
for(int n:arr)
System.out.print("\nPrintArr a["+i+++"]="+n);
}
private static void InviArr( int n) {
int i=0;
while(i<n)
arr[i++]=(int)(Math.random()*1000);
}
}
运行结果为