java.lang.Thread.checkAccess()%uA0方法确定当前运行的线程是否有权修改该线程。
声明
以下是java.lang.Thread.checkAccess()方法的声明
public final void checkAccess()
参数
-
NA
返回值
此方法不返回任何值。
异常
-
SecurityException%uA0-- 如果当前线程不允许访问该线程。
例子
下面的例子显示java.lang.Thread.checkAccess()方法的使用。
package com.yiibai import java.lang.* public class ThreadDemo { public static void main(String args[]){ new ThreadClass("A") Thread t = Thread.currentThread() try { /* determines if the currently running thread has permission to modify this thread */ t.checkAccess() System.out.println("You have permission to modify") } /* if the current thread is not allowed to access this thread, then it result in throwing a SecurityException. */ catch(Exception e) { System.out.println(e) } } } class ThreadClass implements Runnable { Thread t String str ThreadClass(String str) { this.str = str t = new Thread(this) // this will call run() function t.start() } public void run() { System.out.println("This is run() function") } }
让我们来编译和运行上面的程序，这将产生以下结果：
You have permission to modify This is run() function