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?
Knowledge Centre
What is java static import?
By using static imports, we can import the static members from a class rather than the classes from a given package. For example, Thread class has static sleep method, below example gives an idea:

import static java.lang.Thread;
public class MyStaticImportTest {
public static void main(String[] a) {
try{
sleep(100);
} catch(Exception ex){

}
}
}
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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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