Java Byte Class

Introduction

The Byte class in Java is a wrapper for the primitive type byte. It provides utility methods for manipulating byte values and converting between byte and String.

Table of Contents

1. What is Byte?
2. Creating Byte Instances
3. Common Methods
4. Examples of Byte
5. Conclusion

1. What is Byte?

Byte is a final class that wraps a value of the primitive type byte in an object. It provides methods for converting byte values and performing numerical operations.

2. Creating Byte Instances

You can create Byte instances in two main ways:

• Using the Byte constructor: new Byte(byte value) or new Byte(String value)
• Using the Byte.valueOf(byte value) or Byte.valueOf(String value) methods

3. Common Methods

• byteValue(): Returns the value of this Byte object as a primitive byte.
• toString(): Returns a String representation of the byte value.
• parseByte(String s): Parses a String to a primitive byte.
• compare(Byte b1, Byte b2): Compares two Byte objects.
• MAX_VALUE: A constant holding the maximum value a byte can have (127).
• MIN_VALUE: A constant holding the minimum value a byte can have (-128).

4. Examples of Byte

Example 1: Creating Byte Instances

This example demonstrates how to create Byte instances using constructors and valueOf methods.

public class ByteInstanceExample {
    public static void main(String[] args) {
        Byte b1 = new Byte((byte) 10);
        Byte b2 = Byte.valueOf((byte) 20);
        Byte b3 = Byte.valueOf("30");

        System.out.println("b1: " + b1);
        System.out.println("b2: " + b2);
        System.out.println("b3: " + b3);
    }
}

Output:

b1: 10
b2: 20
b3: 30

Example 2: Parsing a String to byte

This example shows how to parse a String to a primitive byte using parseByte.

public class ParseByteExample {
    public static void main(String[] args) {
        byte b1 = Byte.parseByte("50");
        byte b2 = Byte.parseByte("100");

        System.out.println("b1: " + b1);
        System.out.println("b2: " + b2);
    }
}

Output:

b1: 50
b2: 100

Example 3: Comparing Byte Values

In this example, we demonstrate how to compare two Byte values.

public class CompareByteExample {
    public static void main(String[] args) {
        Byte b1 = Byte.valueOf((byte) 10);
        Byte b2 = Byte.valueOf((byte) 20);

        int comparison = Byte.compare(b1, b2);

        if (comparison < 0) {
            System.out.println("b1 is less than b2");
        } else if (comparison > 0) {
            System.out.println("b1 is greater than b2");
        } else {
            System.out.println("b1 is equal to b2");
        }
    }
}

Output:

b1 is less than b2

Conclusion

The Byte class in Java is a useful wrapper for the primitive byte type. It provides methods for manipulating byte values, parsing strings, and performing numerical operations, making it a versatile tool in Java programming.