Neeraj Mishra Collection Leave a comment

Java Properties File – How to Read and Write

In this tutorial you will learn about java properties file and how to perform read and write operations on it. What is properties file? In Java related technologies, properties file is used to store configuration data or settings of application. It has .properties extension. Why we need properties file? It makes application maintenance easier. We can change some information in application by doing changes in properties file. We don’t need to recompile the java source files. Let us

Neeraj Mishra Collection One comment

How to Sort ArrayList of Objects in Java

In this tutorial you will learn how to sort arraylist of objects in java. In our previous tutorial we have seen how to sort arraylist of String or Integer type using Collection.sort() method. Can we use that process to sort an arraylist of custom objects? The answer is big no. For doing this we have to use Comparable or Comparator interfaces. Below I have shared an example for each of them. Sort ArrayList of Objects Using Comparable Comparable is used to

Neeraj Mishra Collection 3 comments

How to Sort ArrayList of String and Integer in Java

In this tutorial you will learn how to sort ArrayList of String or Integer in Java. We can easily sort an arraylist in ascending or descending order using Collections.sort() method. Below I have shared simple example for each of them. Sort ArratList in Java Example to Sort ArrayList of String Below program sorts an arraylist of String type.

package com;

import java.util.ArrayList;
import java.util.Collections;

public class SortStringArrayList {
	public static void main(String args[]){
		ArrayList<String> aList = new ArrayList<String>();
		aList.add("Android");
		aList.add("Windows");
		aList.add("IOS");
		aList.add("Linux");
		aList.add("Mac");
		
		System.out.println("Sort in ascending order");
		Collections.sort(aList);
		for(String s:aList){
			System.out.println(s);
		}

		
		System.out.println("\nSort in descending order");
		Collections.sort(aList,Collections.reverseOrder());
		for(String s:aList){
			System.out.println(s);
		}
	}
}

package com;

import java.util.ArrayList;

import java.util.Collections;

public class SortStringArrayList {

public static void main(String args[]){

ArrayList<String> aList = new ArrayList<String>();

aList.add("Android");

aList.add("Windows");

aList.add("IOS");

aList.add("Linux");

aList.add("Mac");

System.out.println("Sort in ascending order");

Collections.sort(aList);

for(String s:aList){

System.out.println(s);

}

System.out.println("\nSort in descending order");

Collections.sort(aList,Collections.reverseOrder());

for(String s:aList){

System.out.println(s);

}

Output Sort in ascending order Android IOS Linux Mac Windows Sort in descending order Windows Mac Linux IOS Android

« 1 2