dumpstack_Java Thread类的静态void dumpStack（）方法（带示例）

dumpstack

线程类静态void dumpStack() (Thread Class static void dumpStack())

This method is available in package java.lang.Thread.dumpStack().
软件包java.lang.Thread.dumpStack()中提供了此方法。
This method is used to print or display stack tracing of the current thread to System.err (Standard error stream).
此方法用于打印或显示当前线程到System.err (标准错误流)的堆栈跟踪。
The purpose of this method is basically for debugging (i.e. If we call multiple methods so it is difficult to find an error so with the help of this method we can find an error in stack trace or stack hierarchy).
该方法的目的基本上是用于调试(即，如果我们调用多个方法，那么很难发现错误，因此借助该方法，我们可以在堆栈跟踪或堆栈层次结构中找到错误)。
This method is static so this method is accessible with classname too like Thread.dumpStack().
此方法是静态的，因此也可以使用类名访问此方法，例如Thread.dumpStack() 。
The return type of this method is void it does not return anything.
此方法的返回类型为void，它不返回任何内容。
This method does not raise any exception.
此方法不会引发任何异常。

Syntax:

句法：

    static void dumpStack(){
}

Parameter(s):

参数：

We don't pass any object as a parameter in the method of the File.

我们不会在File方法中将任何对象作为参数传递。

Return value:

返回值：

The return type of this method is void, it does not return anything.

此方法的返回类型为void ，它不返回任何内容。

Java程序演示dumpStack()方法的示例 (Java program to demonstrate example of dumpStack() method)

/*  We will use Thread class methods so we are importing 
the package but it is not mandate because 
it is imported by default
*/
import java.lang.Thread;
public class PrintStackTraceOfCurrentThread {
public static void main(String[] args) {
// By using currentThread() of Thread class will return a 
// reference of currently executing thread.
Thread th = Thread.currentThread();
// By using setName() method we are setting the name 
// of current executing thread
th.setName("Main Thread");
// By using setPriority() method we are setting the 
// priority of current executing thread
th.setPriority(2);
//Display Current Executing Thread
System.out.println("Currently Executing Thread is :" + th);
int active_thread = Thread.activeCount();
// Display the number of active threads in current threads thread group
System.out.println("The Current active threads is : " + active_thread);
// Display stack trace of current thread 
// to the System.err (Standard error stream)
Thread.dumpStack();
}
}

Output

输出量

E:\Programs>javac PrintStackTraceOfCurrentThread.java
E:\Programs>java PrintStackTraceOfCurrentThread
Currently Executing Thread is :Thread[Main Thread,2,main]
The Current active threads is : 1
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:1365)
at PrintStackTraceOfCurrentThread.main(PrintStackTraceOfCurrentThread.java:24)