ThreadGroup类的toString()方法返回线程组的字符串表示形式。
语法
public String toString()
返回
它返回线程组的字符串表示形式。
示例
class NewThread extends Thread
{
NewThread(String threadname, ThreadGroup tg)
{
super(tg, threadname);
}
public void run()
{
for (int i = 0; i < 10; i++)
{
try
{
Thread.sleep(10);
}
catch (InterruptedException ex) {
System.out.println(Thread.currentThread().getName()
+ " interrupted"); }
}
System.out.println(Thread.currentThread().getName() +
" completed executing");
}
}
public class ThreadGroupToStringExp
{
public static void main(String arg[])
{
// creating the thread group
ThreadGroup tg1 = new ThreadGroup("parent thread group");
ThreadGroup tg2 = new ThreadGroup(tg1, "child threadGroup");
// creating a thread
NewThread t1 = new NewThread("Thread-1", tg1);
System.out.println(t1.getName() + " starts");
t1.start();
// creating another thread
NewThread t2 = new NewThread("Thread-2", tg1);
System.out.println(t2.getName() + " starts");
t2.start();
// string equivalent of the parent group
System.out.println("String equivalent: "
+ tg1.toString());
// string equivalent of the child group
System.out.println("String equivalent: "
+ tg2.toString());
}
}
执行上面示例代码，得到以下结果:
Thread-1 starts
Thread-2 starts
String equivalent: java.lang.ThreadGroup[name=parent thread group,maxpri=10]
String equivalent: java.lang.ThreadGroup[name=child threadGroup,maxpri=10]
Thread-1 completed executing
Thread-2 completed executing
