How to sort string array in java (3 different ways)

Sorting an Array of string in java
Way 1: Sort String array using CompareTo() method



import java.util.*;
public class Main
{
	public static void main(String []args)
	{
		Scanner sc=new Scanner(System.in);
		System.out.println("Enter no of i/p elements");
		int no_of_ele=sc.nextInt();
		String str_arr[]=new String[no_of_ele];
		for(int i=0;i&lt;no_of_ele;i++)
		{
			str_arr[i]=sc.next();
		}
		//compare
		String temp;
		for(int i=0;i&lt;str_arr.length;i++)
		{
			for(int j=0;j&lt;str_arr.length;j++)
			{ 
				if(str_arr[j].compareTo(str_arr[i])&gt;0)
				{
					temp=str_arr[j];
					str_arr[j]=str_arr[i];
					str_arr[i]=temp;
				}
			}
		}
	}
}

import java.util.*;

public class Main

{

public static void main(String []args)

{

Scanner sc=new Scanner(System.in);

System.out.println("Enter no of i/p elements");

int no_of_ele=sc.nextInt();

String str_arr[]=new String[no_of_ele];

for(int i=0;i<no_of_ele;i++)

{

str_arr[i]=sc.next();

}

//compare

String temp;

for(int i=0;i<str_arr.length;i++)

{

for(int j=0;j<str_arr.length;j++)

{

if(str_arr[j].compareTo(str_arr[i])>0)

{

temp=str_arr[j];

str_arr[j]=str_arr[i];

str_arr[i]=temp;

}

Way 2: Sort String array using Arrays.sort() method






import java.util.*;
public class Main
{
public static void main(String []args){
Scanner sc=new Scanner(System.in);
System.out.println("Enter no of i/p elements");
int no_of_ele=sc.nextInt();
String str[]=new String[no_of_ele];
for(int i=0;i&lt;no_of_ele;i++)
{
str[i]=sc.next();
}
Arrays.sort(str);
System.out.println(Arrays.toString(str));
}
}




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import java.util.*;
public class Main
{
public static void main(String []args){
Scanner sc=new Scanner(System.in);
System.out.println("Enter no of i/p elements");
int no_of_ele=sc.nextInt();
String str[]=new String[no_of_ele];
for(int i=0;i&lt;no_of_ele;i++)
{
str[i]=sc.next();
}
Arrays.sort(str);
System.out.println(Arrays.toString(str));
}
}

Way 3: Sort String array using Collections.sort() method






import java.util.*;
public class Main
{
public static void main(String []args){
Scanner sc=new Scanner(System.in);
System.out.println("Enter no of i/p elements");
int no_of_ele=sc.nextInt();
ArrayList arr=new ArrayList();
while(no_of_ele&gt;0)
{
arr.add(sc.next());
no_of_ele--;
}
System.out.println(arr);
Collections.sort(arr);
System.out.println(arr);

}
}




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import java.util.*;
public class Main
{
public static void main(String []args){
Scanner sc=new Scanner(System.in);
System.out.println("Enter no of i/p elements");
int no_of_ele=sc.nextInt();
ArrayList arr=new ArrayList();
while(no_of_ele&gt;0)
{
arr.add(sc.next());
no_of_ele--;
}
System.out.println(arr);
Collections.sort(arr);
System.out.println(arr);
 
}
}

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