Char in Java: What is Character class in Java?

In Java, we come across situations where we need to use objects instead of primitive data types. To accomplish this, Java provides wrapper class Character for primitive data type char. In this article on Char in Java, let us understand the same in detail.

The following topics will be covered in this article:

• Character class in Java
• Escape sequence
• Methods of character class

Let’s begin!

Character class in Java

The Character class generally wraps the value of all the primitive type char into an object. Any object of the type character may contain a single field whose type is char. The Character class offers a number of useful classes (i.e., static) methods for working with characters.

To create a character object with the character constructor −

Character ch = new Character('a');

The above statement creates a character object which contains ‘a’ of type char. There is only one constructor in character class which expects an argument of the char data type.

Next in this article on Char in Java, let us see few escape sequences used with the characters in Java.

Escape Sequence

A character preceded by a backslash () is generally called an escape sequence. There is a table mentioned below that will help you in understanding this concept.

Since you have understood the escape sequences, let us move ahead and understand the methods that character class offers in Java.

Methods of character class

The following table discusses a few important methods of the character class.

Next, in this article on Char in Java, let us see the practical implementation of the above-discussed methods.

Code:

import java.util.Scanner;
public class JavaCharacterExample1 {
public static void main(String[] args) {
// Ask the user for the first input.
System.out.print("First input:");
// Use the Scanner class to get the user input.
Scanner scanner = new Scanner(System.in);
// Gets the user input.
char[] value1 = scanner.nextLine().toCharArray();
int result1 = 0;
// Count the characters for a specific character.
for (char ch1 : value1) {
result1 = Character.charCount(ch1);
}
// Print the result.
System.out.print("Value: "+result1+"n");
System.out.print("Second input:");
char[] value2 = scanner.nextLine().toCharArray();
for (char ch2 : value2) {
int result2 = Character.hashCode(ch2);
System.out.print("The hash code for the character '"+ch2+"' is given as:"+result2+"n");
}
System.out.print("Third input:");
char[] value3 = scanner.nextLine().toCharArray();
for (char ch3 : value3) {
boolean result3 = Character.isDigit(ch3);
if(result3){
System.out.println("The character '" + ch3 + "' is a digit. ");
}
else{
System.out.println("The character '" + ch3 + "' is not a digit.");
}
System.out.print("Fourth input:");
char[] value4 = scanner.nextLine().toCharArray();
for (char ch4 : value4) {
boolean result4 = Character.isISOControl(ch4);
System.out.println("The fourth character '"+ch4+"' is an ISO Control:"+result4);
}
}
}
}

Output:

First input:89
Value: 1
Second input:J
The hash code for the character 'J' is given as:74
Third input:5
The character '5' is a digit.
Fourth input:h
The fourth character 'h' is an ISO Control:false

With this, we come to an end to this article on Char in Java. I hope you understood the fundamentals of Java. If you found this article on “Char in Java”, check out the Java Training by Edureka, a trusted online learning company with a network of more than 250,000 satisfied learners spread across the globe. We are here to help you with every step on your journey, for becoming a besides this java interview questions, we come up with a curriculum which is designed for students and professionals who want to be a Java Developer. 

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