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throw vs. throws in Java

Educative Answers Team

throw and throws are the two keywords used to declare an exception in Java. They are very useful for programmers who have to handle exceptions.

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Comparison Table

Throw Throws
throw is followed by an instance. For example: throw new SQLException(“SQL Exception”); throws is followed by a class name i.e., throws SQLException;
throw is used within a method. throws is used next to the method signature.
A programmer cannot throw multiple throws at a single time. A programmer can throw multiple throws at a single time. For example: throws IOException, ArithmeticException;
The throw keyword explicitly throws an exception. The throws keyword declares an exception and works similarly to the try-catch block.

throw code

The following example shows how to use the throw keyword in Java; it displays the exception once it occurs.

class Code{  
   void checkMarks(int marks){  
	if(marks<50)  
	   throw new ArithmeticException("Exam failed");  
	else  
	   System.out.println("Exam passed");  
   }  
   public static void main(String args[]){  
	Code object = new Code();
	object.checkMarks(43);   
   }  
}

throws code

The following example explains how to use the throws keyword in java.

class Code{  
  int checkMarks(int marks) throws ArithmeticException
  {  
	    int result= marks/0;
	    return result; 
  }
  public static void main(String args[])
  {  
	  Code object = new Code();
    try
    {
	    System.out.println (object.checkMarks(43)); 
    }  
    catch(ArithmeticException except)
    {
	    System.out.println("Error in dividing number by zero");
    } 
  }
}

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