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Java basics

Throwable


The java.lang.Throwable class is the superclass of all errors and exceptions in the Java language. Only objects that are instances of this class (or one of its subclasses) are thrown by the Java Virtual Machine or can be thrown by the Java throw statement.

Syntax:
public class Throwable
   extends Object
      implements Serializable


Example:

package com.technicia;

import java.lang.*;

public class ThrowableDemo {

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

     try {
        newException();
     }
     catch(Throwable e) {
        System.err.println(e);
        // returns null as the cause is nonexistent or unknown.
        System.err.println("Cause = " + e.getCause());
     }
   }
  
   public static void newException() throws Exception {
      System.out.println("This is newException() function");
      throw new Exception("Exception...");
   }
}
 


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