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JAVA EXAMPLE PROGRAMS

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Built-in Java Annotations: @Override example


Description:

When we use @Override annotation to a method, it let compiler know that we are overriding it from super class. It is not mandatory to use @Override when you override a method. Incase you are using @Override annotation, and the method signature is not found at super class will results compilation error.


Code:
package com.java2novice.annotations;

public class Animal {

	public void makeSound(){
		
	}
}

class Cat extends Animal{
	
	@Override
	public void makeSound(){
		System.out.println("myyyyyaaawwwwww");
	}
}
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Knowledge Centre
String Vs StringBuffer
We know that String is immutable object. We can not change the value of a String object once it is initiated. If we try to change the value of the existing String object then it creates new object rather than changing the value of the existing object. So incase, we are going to do more modificatios on String, then use StringBuffer. StringBuffer updates the existing objects value, rather creating new object.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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