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Tip of the Day
Language: Java
Expertise: All
Oct 10, 2000



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Rethrowing a Throwable Exception in Your Code

Use the fillInStackTrace() method to rethrow a Throwable type of exceptional condition in your code. This is useful if you want to rethrow a exception that occurred while using a method or creating a Object but want to avoid the stack trace from these calls. The intention is to show the stack trace starting form this method or error condition. This a similar to creating a new Object of type Throwable and throwing it as the exception. This happens because when the call to fillInstackTrace method is made, it returns a new Object of type Throwable filled with the execution stack trace. Example code:
import java.io.IOException;

public class testExceptions

//Example of fillInStackTrace	  
void method1() throws Throwable
  	     throw new Throwable ("Throwable Exception in method1"); 	
  	void method2() throws Throwable

//throw new IOException ("Exception in method2");
		catch(Throwable th)
throw th;
throw th.fillInStackTrace();
//similar to
throw new Throwable();		

//Example of fillInStackTrace 
public static void main(String args[]) throws Throwable
		new testExceptions().method2();			
Mahesh Chulet
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