我必须编写一个 for 循环来打印数组中字符的 ASCII 值

Question

这是我目前所拥有的。我不确定如何在 ascii 中打印每个字符的单个值，而不会在每一行上重复这些值。任何帮助将不胜感激。

创建一个 for 循环以打印出与 EACH 关联的所有 ASCII 值
城镇名称或宠物名称的字符（例如，R = 125、a = 97 等）

import java.util.Arrays;

public class Lab1Part2{

    public static void main (String[] args){

    char B = 'B';
    char l = 'l';
    char a = 'a';
    char n  ='n';
    char h = 'h';
    int ascii = B;

        //create array
        char[] JavaCharArray = new char[6];
        JavaCharArray[0] = 'B';
        JavaCharArray[1] = 'l';
        JavaCharArray[2] = 'a';
        JavaCharArray[3] = 'n';
        JavaCharArray[4] = 'c';
        JavaCharArray[5] = 'h';

        //print array
        for(int i=0;i<JavaCharArray.length;i++){
            System.out.println(JavaCharArray[i] + " = " + ascii);
             }



         }
        }

Answer 1

Java 中的char 类型是遗留的，本质上是被破坏的。作为16-bit 值，它无法代表大多数字符。

代码点

相反，学习使用code point 整数来处理单个字符。

int[] codePoints = "Blanch?".codePoints().toArray() ;
for( int codePoint : codePoints ) 
{
    System.out.println( "character: " + Character.toString( codePoint ) + " = code point: " + codePoint ) ;
}

看到这个code run live at IdeOne.com。

character: B = code point: 66
character: l = code point: 108
character: a = code point: 97
character: n = code point: 110
character: c = code point: 99
character: h = code point: 104
character: ? = code point: 128567

您会在String、Character、StringBuilder 等各种类周围找到与“codePoint”相关的方法。另见：The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)

Answer 2

每次进入循环（迭代）都需要计算“ascii”。 char 可以自动转换为 int

//print array
for(int i=0; i<JavaCharArray.length; i++){
    ascii =  JavaCharArray[i];
    System.out.println( JavaCharArray[i] + " = " + ascii);
}

顺便说一句：您在开始时声明了一些 char 变量，但从不使用它们。例如，您可能想做JavaCharArray[0] = B; 而不是JavaCharArray[0] = 'B';

Answer 3

您需要将字符转换为int：

public static void main(String[] args) {

        //create array
        char[] JavaCharArray = new char[6];
        JavaCharArray[0] = 'B';
        JavaCharArray[1] = 'l';
        JavaCharArray[2] = 'a';
        JavaCharArray[3] = 'n';
        JavaCharArray[4] = 'c';
        JavaCharArray[5] = 'h';

        //print array
        System.out.print("(");
        for (int i = 0; i < JavaCharArray.length; i++) {
            System.out.print(JavaCharArray[i] + " = " + (int) JavaCharArray[i]+ ", ");
        }
        System.out.print(")");


    }