Java Throwable setStackTrace() Method

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Description

The Java Throwable setStackTrace() method sets the stack trace elements that will be returned by getStackTrace() and printed by printStackTrace() and related methods.

Declaration

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

public void setStackTrace(StackTraceElement[] stackTrace)

Parameters

stackTrace − This is the stack trace elements to be associated with this Throwable.

Return Value

This method does not return any value.

Exception

NullPointerException − if stackTrace is null, or if any of the elements of stackTrace are null

Example: Setting Stacktrace of a Throwable

The following example shows the usage of Java Throwable setStackTrace() method. We've defined a method raiseException() which throws a Throwable after setting the Stacktrace using setStackTrace() method. In main method, raiseException() method is called and in catch block exception stack trace is retrieved and printed.

package com.tutorialspoint;

public class ThrowableDemo {

   public static void main(String[] args) {

      try {
         raiseException();
      } catch(Throwable e) {
         // access to the stack trace
         StackTraceElement[] trace = e.getStackTrace();
         System.err.println(trace[0].toString());
      }
   }
  
   public static void raiseException()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;
   }
}

Output

Let us compile and run the above program, this will produce the following result −

ClassName.methodName(fileName:10)

Example: Setting Stacktrace of an Exception

The following example shows the usage of Java Throwable setStackTrace() method. We've defined a method raiseException() which throws an Exception after setting the Stacktrace using setStackTrace() method. In main method, raiseException() method is called and in catch block exception stack trace is retrieved and printed.

package com.tutorialspoint;

public class ThrowableDemo {

   public static void main(String[] args) {

      try {
         raiseException();
      } catch(Throwable e) {
         // access to the stack trace
         StackTraceElement[] trace = e.getStackTrace();
         System.err.println(trace[0].toString());
      }
   }
  
   public static void raiseException()throws Exception {

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

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

Output

Let us compile and run the above program, this will produce the following result −

ClassName.methodName(fileName:10)

Example: Setting Stacktrace of a RuntimeException

The following example shows the usage of Java Throwable setStackTrace() method. We've defined a method raiseException() which throws an RuntimeException after setting the Stacktrace using setStackTrace() method. In main method, raiseException() method is called and in catch block exception stack trace is retrieved and printed.

package com.tutorialspoint;

public class ThrowableDemo {

   public static void main(String[] args) {

      try {
         raiseException();
      } catch(Throwable e) {
         // access to the stack trace
         StackTraceElement[] trace = e.getStackTrace();
         System.err.println(trace[0].toString());
      }
   }
  
   public static void raiseException()throws RuntimeException {

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

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

Output

Let us compile and run the above program, this will produce the following result −

ClassName.methodName(fileName:10)