how to get single value from input string in java

To get a single value from an input string in Java, you can use the Scanner class to read the input and extract the value using one of the nextXXX() methods provided by the class.

Here's an example of how you can get a single value from an input string in Java:

import java.util.Scanner;

// ...

String input = "123 456 789";
Scanner scanner = new Scanner(input);

int num1 = scanner.nextInt();
int num2 = scanner.nextInt();
int num3 = scanner.nextInt();

In this example, the input string contains three integers separated by whitespace characters. The scanner object is a Scanner instance that reads the input string, and the nextInt() method is used to read and parse the input as integers. The num1, num2, and num3 variables hold the extracted values.

You can use different nextXXX() methods to extract values of different types from the input string. For example, you can use the nextDouble() method to extract a double value, or the nextLine() method to extract a string.

It's important to note that the nextXXX() methods throw a NoSuchElementException if the input is not in the expected format. You should handle this exception appropriately in your code.