JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: How to override toString() method with enum?


Description:

This example gives how to override toString() method with enum constants. By default the enum toString() method returns the constant name itself. You can change return value by overriding toString() method.


Code:
package com.java2novice.enums;

public class MyEnumtoString {

	enum Fruit {
	    GRAPE{
	    	public String toString(){
	    		return "A grape is a non-climacteric fruit.";
	    	}
	    }, 
	    APPLE{
	    	public String toString(){
	    		return "The apple is the pomaceous fruit.";
	    	}
	    }, 
	    MANGO{
	    	public String toString(){
	    		return "The mango is a fleshy stone fruit.";
	    	}
	    }, 
	    LEMON{
	    	public String toString(){
	    		return "Lemons are slow growing varieties of citrus.";
	    	}
	    } 
	}
	
	public static void main(String a[]){
		System.out.println(Fruit.GRAPE);
		System.out.println(Fruit.APPLE);
		System.out.println(Fruit.MANGO);
	}
}

Output:
A grape is a non-climacteric fruit.
The apple is the pomaceous fruit.
The mango is a fleshy stone fruit.
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List Of All Enum Programs:

  1. Basic Enum example.
  2. How to call enum, which is defined inside a class?
  3. How to override toString() method with enum?
  4. How to create custom constructor enum?
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What is fail-fast in java?
A fail-fast system is nothing but immediately report any failure that is likely to lead to failure. When a problem occurs, a fail-fast system fails immediately. In Java, we can find this behavior with iterators. Incase, you have called iterator on a collection object, and another thread tries to modify the collection object, then concurrent modification exception will be thrown. This is called fail-fast.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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