Comparable and Comparator usage for ascending and descending order Obj ascending and descending

Comparable and Comparator usage for ascending and descending order
Obj ascending and descending

package com.demo;

import java.util.Arrays;

public class SortFruitObject{

 

public static void main(String args[]){

Fruit[] fruits = new Fruit[4];

Fruit pineappale = new Fruit("Pineapple", "Pineapple description",70); 

Fruit apple = new Fruit("Apple", "Apple description",100); 

Fruit orange = new Fruit("Orange", "Orange description",80); 

Fruit banana = new Fruit("Banana", "Banana description",90); 

fruits[0]=pineappale;

fruits[1]=apple;

fruits[2]=orange;

fruits[3]=banana;

//to sort based on one property 

//Arrays.sort(fruits);

//to sort based on more than one property

// Arrays.sort(fruits,Fruit.FruitNameComparator);

int i=0;

for(Fruit temp: fruits){

  System.out.println("fruits " + ++i + " : " + temp.getFruitName() + 

", Quantity : " + temp.getQuantity());

}

}

}

package com.demo;

import java.util.Comparator;

public class Fruit implements Comparable<Fruit> {

private String fruitName;

private String fruitDesc;

private int quantity;

public Fruit(String fruitName, String fruitDesc, int quantity) {

super();

this.fruitName = fruitName;

this.fruitDesc = fruitDesc;

this.quantity = quantity;

}

public String getFruitName() {

return fruitName;

}

public void setFruitName(String fruitName) {

this.fruitName = fruitName;

}

public String getFruitDesc() {

return fruitDesc;

}

public void setFruitDesc(String fruitDesc) {

this.fruitDesc = fruitDesc;

}

public int getQuantity() {

return quantity;

}

public void setQuantity(int quantity) {

this.quantity = quantity;

}

public int compareTo(Fruit compareFruit) {

int compareQuantity = ((Fruit) compareFruit).getQuantity();

// ascending order

return this.quantity - compareQuantity;

// descending order

// return compareQuantity - this.quantity;

}

// use this to sort based on more than one property

public static Comparator<Fruit> FruitNameComparator = new Comparator<Fruit>() {

public int compare(Fruit fruit1, Fruit fruit2) {

String fruitName1 = fruit1.getFruitName().toUpperCase();

String fruitName2 = fruit2.getFruitName().toUpperCase();

// ascending order

return fruitName1.compareTo(fruitName2);

// descending order

// return fruitName2.compareTo(fruitName1);

}

};

}