java clear bufffer to take next string inpuit

To clear the buffer in Java and allow the user to input a new string, you can use the nextLine method of the Scanner class.

Here's an example of how to clear the buffer and input a new string using the Scanner class:

import java.util.Scanner;

public class Main {
  public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);

    // input and print the first string
    System.out.print("Enter a string: ");
    String str1 = scanner.nextLine();
    System.out.println("You entered: " + str1);

    // clear the buffer and input the second string
    scanner.nextLine();  // clear the buffer
    System.out.print("Enter another string: ");
    String str2 = scanner.nextLine();
    System.out.println("You entered: " + str2);

    scanner.close();
  }
}

In this example, the nextLine method is used to input the first string and store it in the str1 variable. After the first string has been input, the buffer still contains the newline character that was entered after the string. To clear the buffer and allow the user to input a new string, we call the nextLine method again, but do not store the result. This consumes the newline character in the buffer and allows the user to input a new string.

The nextLine method reads the entire line of input, including any whitespace characters, until it encounters a newline character. This makes it a convenient way to input and clear the buffer in a single step.

Keep in mind that you should close the Scanner object when you are done with it, to free up system resources. You can do this by calling the close method.