java 中获得当前方法名及行号．．．．．－－－可以做日志记录及跟踪

本文链接：https://blog.youkuaiyun.com/buyaore_wo/article/details/6058820

本文介绍了在Java中如何获取当前线程的调用堆栈信息，并对比了JDK 1.5之前和之后的不同方法。通过使用`getStackTrace()`方法，可以获取到包括方法名、类名及行号等详细信息。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

jdk1.5以前:

(new Exception()).getStackTrace()［2］．getMethodName()

(new Exception()).getStackTrace()［2］．getClassName()()

(new Exception()).getStackTrace()［2］．getLineNumber()

jdk1.5之后

Thread.currentThread() ．getStackTrace()［2］．getMethodName()

Thread.currentThread() .getStackTrace()［2］．getClassName()()

Thread.currentThread() .getStackTrace()［2］．getLineNumber()

其实看看源代码

Thread.currentThread() ．getStackTrace()中就是用的 (new Exception()).getStackTrace()

如下:

/** * Returns an array of stack trace elements representing the stack dump * of this thread. This method will return a zero-length array if * this thread has not started or has terminated. * If the returned array is of non-zero length then the first element of * the array represents the top of the stack, which is the most recent * method invocation in the sequence. The last element of the array * represents the bottom of the stack, which is the least recent method * invocation in the sequence. * * <p>If there is a security manager, and this thread is not * the current thread, then the security manager's * <tt>checkPermission</tt> method is called with a * <tt>RuntimePermission("getStackTrace")</tt> permission * to see if it's ok to get the stack trace. * * <p>Some virtual machines may, under some circumstances, omit one * or more stack frames from the stack trace. In the extreme case, * a virtual machine that has no stack trace information concerning * this thread is permitted to return a zero-length array from this * method. * * @return an array of <tt>StackTraceElement</tt>, * each represents one stack frame. * * @throws SecurityException * if a security manager exists and its * <tt>checkPermission</tt> method doesn't allow * getting the stack trace of thread. * @see SecurityManager#checkPermission * @see RuntimePermission * @see Throwable#getStackTrace * * @since 1.5 */ public StackTraceElement[] getStackTrace() { if (this != Thread.currentThread()) { // check for getStackTrace permission SecurityManager security = System.getSecurityManager(); if (security != null) { security.checkPermission( SecurityConstants.GET_STACK_TRACE_PERMISSION); } if (!isAlive()) { return EMPTY_STACK_TRACE; } return dumpThreads(new Thread[] {this})[0]; } else { // Don't need JVM help for current thread return (new Exception()).getStackTrace(); } }