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JAVA EXAMPLE PROGRAMS

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Built-in Java Annotations: @Deprecated example


Description:

The @Deprecated annotation will be used to inform the compiler to generate a warning whenever a program uses a method, class, or field with the @Deprecated annotation. It is good to document the reason with Javadoc @deprecated tag. Make a note of case difference with @Deprecated and @deprecated. @deprecated is for documentation purpose.


Code:
package com.java2novice.annotations;

public class MyDeprecatedExmp {
	
	/**
     * @deprecated
     * reason for why it was deprecated
     */
	@Deprecated
	public void showDeprecatedMessage(){
		System.out.println("This method is marked as deprecated");
	}
	
	public static void main(String a[]){
		
		MyDeprecatedExmp mde = new MyDeprecatedExmp();
		mde.showDeprecatedMessage();
	}
}

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Prevent a method from being overridden
By specifying final keyword to the method you can avoid overriding in a subcalss. Similarlly one can use final at class level to prevent creating subclasses.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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