JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: Basic Enum example.


Description:

This example defines a basic enum type called Fruits. It contains few constants representing fruits. The switch case uses these constants to execute conditions.


Code:
package com.java2novice.enums;

public class MyBasicEnum {

	private Fruits myFruit;
	
	public MyBasicEnum(Fruits fruit){
		this.myFruit = fruit;
	}
	
	public void getFruitDesc(){
		
		switch (myFruit) {
	        case GRAPE:
	            System.out.println("A grape is a non-climacteric fruit.");
	            break;
	                
	        case APPLE:
	            System.out.println("The apple is the pomaceous fruit.");
	            break;
	                     
	        case MANGO: 
	            System.out.println("The mango is a fleshy stone fruit.");
	            break;
	         
	        case LEMON: 
	        	System.out.println("Lemons are slow growing varieties of citrus.");
	            break;
	            
	        default:
	            System.out.println("No desc available.");
	            break;
	    }
	}
	
	public static void main(String a[]){
		MyBasicEnum grape = new MyBasicEnum(Fruits.GRAPE);
		grape.getFruitDesc();
		MyBasicEnum apple = new MyBasicEnum(Fruits.APPLE);
		apple.getFruitDesc();
		MyBasicEnum lemon = new MyBasicEnum(Fruits.LEMON);
		lemon.getFruitDesc();
		MyBasicEnum guava = new MyBasicEnum(Fruits.GUAVA);
		guava.getFruitDesc();
	}
}

enum Fruits {
    GRAPE, APPLE, MANGO, LEMON,GUAVA 
}

Output:
A grape is a non-climacteric fruit.
The apple is the pomaceous fruit.
Lemons are slow growing varieties of citrus.
No desc available.
Next Program >>

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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A race condition is a situation in which two or more threads or processes are reading or writing some shared data, and the final result depends on the timing of how the threads are scheduled. Race conditions can lead to unpredictable results and subtle program bugs. A thread can prevent this from happening by locking an object. When an object is locked by one thread and another thread tries to call a synchronized method on the same object, the second thread will block until the object is unlocked.
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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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