Java Character forDigit() 方法

2024 年 11 月 6 日 | 阅读 2 分钟

character 类的 forDigit(int digit, int radix) 方法根据指定的基数确定特定数字的字符表示。如果数字的值在指定的基数中不是有效的数字，或者基数的值不是有效的基数，则返回一个空字符。如果数字小于 10，则返回 '0'+digit。否则，返回 'a'+digit-10 的值。

语法

参数

上述方法需要两个参数

需要转换为字符的数字。

基数

返回值

forDigit(int digit, int radix) 方法返回指定索引中指定数字的 char 表示。

示例 1

public class JavaCharacterforDigitExample1 {
    public static void main(String[] args) {
	 int a1 = 5;
	 int a2 = 6;
       char ch1 = Character.forDigit(a1, 10);
	char ch2 = Character.forDigit(a2, 16);
String str1 = "The char representation of " + a1 + " in radix 10 is " + ch1; String str2 = "The char representation 
of " + a2 + " in radix 16 is " + ch2; System.out.println( str1);
System.out.println( str2 );
	   }
	}

输出

The char representation of 5 in radix 10 is 5
The char representation of 6 in radix 16 is 6

示例 2

public class JavaCharacterforDigitExample2 {
    public static void main(String[] args) {
        int a1 = 5;
        int a2 = 15;
        int a3 = 27;
        char ch1 = Character.forDigit(a1, 10);
        char ch2 = Character.forDigit(a2, 16);
        char ch3 = Character.forDigit(a3, 34);
        String str1 = "The char representation of " + a1 + " in radix 10 is " + ch1;
        String str2 = "The char representation of " + a2 + " in radix 16 is " + ch2;
        String str3 = "The char representation of " + a3 + " in radix 16 is " + ch3;
        System.out.println( str1 );
        System.out.println( str2 );
        System.out.println( str3 );
     }
  }

输出

The char representation of 5 in radix 10 is 5
The char representation of 15 in radix 16 is f
The char representation of 27 in radix 16 is r

示例 3

import java.util.Scanner;
public class JavaCharacterforDigitExample3 {
     public static void main(String[] args) {
	 // Ask the user for the input
	    System.out.print("Enter an input:");
	    Scanner s = new Scanner(System.in);
	    int digit = s.nextInt();
	  // Ask the user for the radix
	    System.out.print("Enter the radix:");
	     int radix = s.nextInt();
	     char result = Character.forDigit(digit, radix);
  System.out.println("The character representation using radix \'" + radix + "\' for digit " + digit + "  is : " + result);
	         }
	}

输出

Enter an input:4
Enter the radix:7
The character representation using radix '7' for digit 4  is : 4

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Java Character forDigit() 方法

语法

参数

返回值

示例 1

示例 2

示例 3

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Java Character forDigit() 方法

语法

参数

返回值

示例 1

示例 2

示例 3

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