Thread.dumpStack()

静态dumpstack()方法提供一个new exception ("stack trace").printstacktrace ()的封装，打印一个追踪当前线程的堆栈


public class TestDumpStack 
{ 
public static void main(String[]args) 
{ 
new Common().getInfo(); 
} 
} 

class Common 
{ 
private String info = "dump stack"; 

public String getInfo() 
{ 
Thread.dumpStack(); 

return info; 
} 
} 

运行结果会显示： 
java.lang.Exception: Stack trace 
at java.lang.Thread.dumpStack(Unknown Source) 
at Common.getInfo(TestDumpStack.java:16) 
at TestDumpStack.main(TestDumpStack.java:6) 
为什么会是Unkown Source