Difference between throw and throws in Java

Main difference between throw and throws in Java is that throw is used to throw an exception, whereas throws is used to declare an exception.

When there is a checked exception then we need to handle it with throws, while for unchecked exceptions we can have exception propagation with throw keyword.

Following are the major differences between throw and throws in Java .

**throw** vs **throws**
throw	throws
`throw` keyword is used to throw an exception explicitly.	`throws` keyword is used to declare one or more exceptions, separated by comma.
Single exception is thrown by using `throw`.	Multiple exceptions can be thrown by using `throws`.
`throw` keyword is used within the method.	`throws` keyword is used with the method signature.
Syntax wise throw keyword is followed by the instance variable.	Syntax wise throws keyword is followed by exception class names.
Checked exception cannot be propagated using `throw`. Unchecked exception can be propagated using `throw`.	For the propagation checked exception must use throws keyword followed by specific exception class name.

Throw Example

public class Test 
{ 
    void checkAge(int age){  
        if(age<18)  
           throw new ArithmeticException("Not Eligible for voting");  
        else  
           System.out.println("Eligible for voting");  
       }  
 
       public static void main(String args[]){  
           Test obj = new Test();
           obj.checkAge(13);  
           System.out.println("End Of Program");  
       }  
} 
 
OUTPUT
======
Exception in thread "main" java.lang.ArithmeticException: Not Eligible for voting
	at Test.checkAge(Test.java:5)
	at Test.main(Test.java:12)

Throws Example

public class Test 
{ 
    int division(int a, int b) throws ArithmeticException{  
        int t = a/b;
        return t;
       }  
       public static void main(String args[]){  
           Test obj = new Test();
        try{
           System.out.println(obj.division(15,0));  
        }
        catch(ArithmeticException e){
           System.out.println("can't divide number by zero");
        }
       }  
} 
 
OUTPUT
======
can't divide number by zero

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