Java program converts int type variable to char

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In this program, we will learn how to convert an integer (int) variable to a character (char) in Java.

To understand this example, you should understand the followingJava programmingTopic:

• Java variables and (original) data types

Example 1: Java program to convert int to char

class Main {
　　public static void main(String[] args) {
　　　　//Creare variabile di tipo int
　　　　int num1 = 80;
　　　　int num2 = 81;
　　　　//Convertire int in char
　　　　//Explicit type conversion
　　　　char a = (char)num1;
　　　　char b = (char)num2;
　　　　//Stampare il valore
　　　　System.out.println(a);　　　　//　P
　　　　System.out.println(b);　　　　//　Q
　　}
}

In the above example, we have int type variables num1 and num2. Note this line,

char a = (char)num1;

Here, we use type conversion to convert an int type variable to a char type variable. For more information, please visitConversione di tipo Java。

Please note that these int values are considered ASCII values. Therefore, we getPhas an int value80and Q has an int value of 81. This is because P and Q have the ASCII values of 80 and 81。

Example 2: Convert int to char using the forDigit() method

We can also use the forDigit() method of the Character class to convert an int type variable to a char type.

class Main {
　　public static void main(String[] args) {
　　　　//Creare variabile di tipo int
　　　　int num1 = 1;
　　　　int num2 = 13;
　　　　//Convertire int in char
　　　　//For values between 0-9
　　　　char a = Character.forDigit(num1, 10);
　　　　//For values between 0-9
　　　　char b = Character.forDigit(num2, 16);
　　　　//Stampare il valore
　　　　System.out.println(a);　　　　// 1
　　　　System.out.println(b);　　　　//　d
　　}
}

Note the expression

char a = Character.forDigit(num1, 10);

We have already used the forDigit() method, which is a method to convert a specified int value to a char value.

Here, 10 and 16 are the base values of decimal and hexadecimal numbers, respectively. That is, if the int value is between 0 and 9, we use 10 as the base value; if the int value is between 0 and 15, we use 16, and so on.

Example 3: By adding the char character with the character "0", convert char to int

In Java, we can also convert an integer by" 0"Aggiungi a un intero per convertirlo in un carattere. Ad esempio,

class Main {
　　public static void main(String[] args) {
　　　　//Creare variabile di tipo int
　　　　int num1 = 1;
　　　　int num2 = 9;
　　　　//Convertire int in char
　　　　char a = (char)(num1 + '0');
　　　　char b = (char)(num2 + '0');
　　　　//Stampare il valore
　　　　System.out.println(a);　　　　// 1
　　　　System.out.println(b);　　　　// 9
　　}
}

Nell'esempio sopra, notate le seguenti righe:

char a = (char)(num1 + '0');

Qui, il carattere" 0"in valore ASCII 48。Convertiamo il valore 48 Sommando con num1 (ovvero 1). Il risultato è 49 Il suo valore ASCII è1。Di conseguenza, utilizzeremo il carattere '1' come output.

Attenzione：Questo si applica solo ai valori int0 a 9。

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