Java Float intValue Method

Introduction

In this lab, you will learn how to use the Java intValue() method of the Float class to convert a Float object into an integer value.

Converting User Input

1. Open the Java file using the following command:

touch ~/project/FloatToInt.java

2. Replace the existing code with the following code:

import java.util.Scanner;

public class FloatToInt {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        // Getting the user input as float value
        System.out.print("Enter a floating point value: ");
        float f = sc.nextFloat();

        // Creating a Float object from the user input
        Float f1 = f;

        // Converting the Float object to int
        int i = f1.intValue();

        // Displaying the int value
        System.out.println("Float value: " + f1);
        System.out.println("Int value: " + i);
    }
}

3. Save the file and exit the editor by pressing CTRL+X, then Y, then ENTER.
4. Compile the code using the following command:

javac ~/project/FloatToInt.java

5. Execute the code by running the following command:

java FloatToInt

6. Enter a floating point value when prompted
7. The code output should be:

Enter a floating point value: 45.6
Float value: 45.6
Int value: 45

Handling Exception

1. Open the Java file using the following command:

touch ~/project/FloatToInt.java

2. Replace the existing code with the following code:

import java.util.Scanner;

public class FloatToInt {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);

        try {
            // Getting the user input as float value
            System.out.print("Enter a floating point value: ");
            float f = sc.nextFloat();

            // Creating a Float object from the user input
            Float f1 = f;

            // Converting the Float object to int
            int i = f1.intValue();

            // Displaying the int value
            System.out.println("Float value: " + f1);
            System.out.println("Int value: " + i);
        } catch (Exception e) {
            System.out.println("Invalid input. Please enter a valid floating point value.");
        }
    }
}

3. Save the file and exit the editor by pressing CTRL+X, then Y, then ENTER.
4. Compile the code using the following command:

javac ~/project/FloatToInt.java

5. Execute the code by running the following command:

java FloatToInt

6. Try to enter an invalid input like a string or a hexadecimal value.
7. The code output should be:

Enter a floating point value: abcd
Invalid input. Please enter a valid floating point value.

Summary

In this lab, you have learned how to use the Java intValue() method of the Float class. You have learned how to create a Float object, convert it to an integer value, and display the output. You have also learned how to handle exceptions when the user enters an invalid input.