Given a String “str” in Java, the task is to convert this string to byte type.
Examples:
Input: str = "1" Output: 1 Input: str = "3" Output: 3
Approach 1: (Naive Method)
One method is to traverse the string and add the numbers one by one to the byte type. This method is not an efficient approach.
Approach 2: (Using Byte.parseByte() method)
The simplest way to do so is using parseByte() method of Byte class in java.lang package. This method takes the string to be parsed and returns the byte type from it. If not convertible, this method throws error.
Syntax:
Byte.parseByte(str);
Below is the implementation of the above approach:
Example 1: To show successful conversion
// Java Program to convert string to byte class GFG { // Function to convert String to Byte public static byte convertStringToByte(String str) { // Convert string to byte // using parseByte() method return Byte.parseByte(str); } // Driver code public static void main(String[] args) { // The string value String stringValue = "1"; // The expected byte value byte byteValue; // Convert string to byte byteValue = convertStringToByte(stringValue); // Print the expected byte value System.out.println( stringValue + " after converting into byte = " + byteValue); }} |
1 after converting into byte = 1
Approach 3: (Using Byte.valueOf() method)
The valueOf() method of Byte class converts data from its internal form into human-readable form.
Syntax:
Byte.valueOf(str);
Below is the implementation of the above approach:
Example 1: To show successful conversion
// Java Program to convert string to byte class GFG { // Function to convert String to Byte public static byte convertStringToByte(String str) { // Convert string to byte // using valueOf() method return Byte.valueOf(str); } // Driver code public static void main(String[] args) { // The string value String stringValue = "1"; // The expected byte value byte byteValue; // Convert string to byte byteValue = convertStringToByte(stringValue); // Print the expected byte value System.out.println( stringValue + " after converting into byte = " + byteValue); }} |
1 after converting into byte = 1
