null character java

In this tutorial, I will be sharing about the null character in java. char keyword represents a primitive data type. First, we will look into how to represent empty char in Java.

Read Also:  How to convert char to Character in Java

💡 Did You Know?

The length of the null character in Java is not 0 but 1 as shown below:

  String str = Character.toString('\0');

 System.out.println(str.length()); // Output: "1"

How to represent a Null or Empty Character in Java

There are 3 ways through which we can represent the null or empty character in Java.

1. Using Character.MIN_VALUE
2. Using '\u0000'
3. Using '\0'

1. Using Character.MIN_VALUE

Below we have assigned the smallest value of char data type i.e. Character.MIN_VALUE to variable ch.

public class EmptyCharacterExample {
    public static void main(String args[]) {
      // Assign null character to ch variable    
      char ch = Character.MIN_VALUE;
      String givenString = "Alive is Awesome";
      // Replacing 'A' in the givenString with null character 
      String result = givenString.replace('A',ch);
      // Printing the result string
      System.out.println("Replace givenString with null char: " + result);
    }
}

Output:
Replace givenString with null char: live is wesome

2. Using '\u0000'

We will assign char variable ch with '\u0000'. '\u0000' is the lowest range of the Unicode system used by Java.

public class EmptyCharacterExample2 {
    public static void main(String args[]) {
      // Assign null character to ch variable    
      char ch = '\u0000';
      String givenString = "Be in present";
      // Replacing 'e' in the givenString with null character 
      String result = givenString.replace('e',ch);
      // Printing the result string
      System.out.println("Replace givenString with null char: " + result);
    }
}

Output:
Replace givenString with null char: B in pr s nt

3. Using '\0'

We will assign char variable ch with '\0' special character. '\0' represents null.

public class EmptyCharacterExample3 {
    public static void main(String args[]) {
      // Assign null character to ch variable    
      char ch = '\0';
      String givenString = "Love Yourself";
      // Replacing 'o' in the givenString with null character 
      String result = givenString.replace('o',ch);
      // Printing the result string
      System.out.println("Replace givenString with null char: " + result);
    }
}

Output:
Replace givenString with null char: L ve Y urself

That's all for today. Please mention in the comments in case you have any questions related to the null character in java.