Java.lang.Throwable.printStackTrace() Method

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Description

The java.lang.Throwable.printStackTrace(PrintStream s) method prints this throwable and its backtrace to the specified print stream.

Declaration

Following is the declaration for java.lang.Throwable.printStackTrace() method

public void printStackTrace(PrintStream s)

Parameters

  • s -- This is the PrintStream to use for output

Return Value

This method does not return any value.

Exception

  • NA

Example

The following example shows the usage of java.lang.Throwable.printStackTrace() method.

package com.tutorialspoint;

import java.lang.*;

public class ThrowableDemo {

   public static void main(String[] args) throws Throwable {

      OutputStream out;
      try {
         ExceptionFunc();
      }
      catch(Throwable e) {
         out = new FileOutputStream("file.text");
         // prints this throwable and its backtrace to the print stream
         PrintStream ps = new PrintStream(out);      
         e.printStackTrace(ps);
      }
   }
  
   public static void ExceptionFunc() throws Throwable {

      Throwable t = new Throwable("This is new Exception...");
      StackTraceElement[] trace = new StackTraceElement[] {
         new StackTraceElement("ClassName","methodName","fileName",10)
      };

      // sets the stack trace elements
      t.setStackTrace(trace);
      throw t;
   }
}

Let us assume we have a text file file.txt which gets generated as an output for our example program.The file content consist of:

java.lang.Throwable: This is new Exception...
	at ClassName.methodName(fileName:10)



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