JAVA数组中怎么保存空格

<code class="java">String str = "Hello World";
char[] charArray = str.toCharArray();</code>

<code class="java">Character[] charArray = new Character[str.length()];
charArray[0] = 'H';
charArray[1] = 'e';
charArray[2] = 'l';
charArray[3] = 'l';
charArray[4] = 'o';
charArray[5] = ' ';</code>

<code class="java">StringBuilder sb = new StringBuilder();
sb.append('H').append('e').append('l').append('l').append('o').append(' ');
char[] charArray = sb.toString().toCharArray();</code>

<code class="java">import java.util.Arrays;

public class Main {
    public static void main(String[] args) {
        // 使用字符串数组
        String[] stringArray = "Hello World".split("");
        System.out.println(Arrays.toString(stringArray));

        // 使用包装类
        Character[] charArray = new Character[5];
        charArray[0] = 'H';
        charArray[1] = 'e';
        charArray[2] = 'l';
        charArray[3] = 'l';
        charArray[4] = 'o';
        System.out.println(Arrays.toString(charArray));

        // 使用 StringBuilder
        StringBuilder sb = new StringBuilder();
        sb.append('H').append('e').append('l').append('l').append('o').append(' ');
        char[] charArray2 = sb.toString().toCharArray();
        System.out.println(Arrays.toString(charArray2));
    }
}</code>

<code>[H, e, l, l, o,  , W, o, r, l, d]
[H, e, l, l, o]
[H, e, l, l, o,  ]</code>