Java Program to Find the Largest Two Numbers in an Array

This is a Java Program to Find the Largest Two Numbers in a Given Array.

Enter size of array and then enter all the elements of that array. Now we first sort the array in decreasing order using double for loops and hence get the first two elements as output.

Here is the source code of the Java Program to Find the Largest Two Numbers in a Given Array. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

```
import java.util.Scanner;
```
```
public class largest_and_second
```
```
{
```

	public static void main (String[] args)

```
	{
```

		Scanner scn = new Scanner (System.in);

		System.out.print("Enter no. of elements you want in array:");

```
                int n = scn.nextInt();
```
```
 
```
```
		int array[] = new int[n];
```

                System.out.println("Enter all the elements:");

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

```
		{
```
```
			array[i] = scn.nextInt();
```
```
		}
```
```
 
```
```
		int largest1, largest2, temp;
```
```
 
```
```
		largest1 = array[0];
```
```
		largest2 = array[1];
```
```
 
```
```
		if (largest1 < largest2)
```
```
		{
```
```
			temp = largest1;
```
```
			largest1 = largest2;
```
```
			largest2 = temp;
```
```
		}
```
```
 
```

		for (int i = 2; i < array.length; i++)

```
		{
```
```
			if (array[i] > largest1)
```
```
			{
```
```
				largest2 = largest1;
```
```
				largest1 = array[i];
```
```
			}
```

			else if (array[i] > largest2 && array[i] != largest1)

```
			{
```
```
				largest2 = array[i];
```
```
			}
```
```
		}
```
```
 
```

		System.out.println ("The First largest is " + largest1);

		System.out.println ("The Second largest is " + largest2);

```
 
```
```
	}
```
```
}
```

Output:

Enter no. of elements you want in array:5
Enter all the elements:
1
5
4
8
7
The First largest is 8
The Second largest is 7
 
Enter no. of elements you want in array:7
Enter all the elements:
3
2
1
3
2
1
3
The First largest is 3
The Second largest is 2

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