Question

我有来自学校的这个作业，但我不确定我做错了第二个阵列没有采取第一个的价值，你能帮我吗？

public static void main(String[] rpp) {

        String[] word = new String[7];        
        word[0] = "D";
        word[1] = "E";
        word[2] = "N";
        word[3] = "T";
        word[4] = "I";
        word[5] = "S";
        word[6] = "T";        

        String[] inverseWord = new String[7];
        inverseWord[0] = "";
        inverseWord[1] = "";
        inverseWord[2] = "";
        inverseWord[3] = "";
        inverseWord[4] = "";
        inverseWord[5] = "";       


        for(int x = word.length;x <= 0;x--){
            for(int y = 0;y <= word.length;y++){
                inverseWord[y] = word[x];                
            }            
        }        
        System.out.print(Arrays.toString(inverseWord) + "\n");
    }

Answer 1

数组索引从0开始。这意味着如果长度为L，则数组中的最后一个索引将为（L-1）。

这意味着您需要撰写int x = word.length或int x = word.length - 1而不是y <= word.length而不是y < word.length。

此外，外部循环中的条件应为y <= word.length - 1，而不是x >= 0。

Answer 2

您不需要两个for循环
x应大于等于0且不小于

public static void main(String[] rpp) {
    String[] word = new String[7];
    word[0] = "D";
    word[1] = "E";
    word[2] = "N";
    word[3] = "T";
    word[4] = "I";
    word[5] = "S";
    word[6] = "T";

    String[] inverseWord = new String[7];
    inverseWord[0] = "";
    inverseWord[1] = "";
    inverseWord[2] = "";
    inverseWord[3] = "";
    inverseWord[4] = "";
    inverseWord[5] = "";

    for (int x = word.length - 1; x >= 0; x--) {
        inverseWord[(word.length-1) - x] = word[x];
    }
    System.out.print(Arrays.toString(inverseWord) + "\n");
}

Answer 3

外部for循环的条件应为

x＆gt; = 0

Answer 4

使用2个变量重写用于反转的for循环。这是最简单和最基本的方法。

 for(int i=word.length-1,int j=0;i>=0,j>=0;i--,j++) //loop for reversing
            {
                inverseWord[j] = word[i];
            }

    for(int i=0;i>=0;i++) // for displaying the inverseword array
    {
    System.out.print(inverseWord[j];
    }

Answer 5

您可以使用StringBuilder将单个字符附加到String中。字符串“DENTIST”可以使用String类中的charAt方法和for循环分解为相反顺序的字符。

public class MainClass {

    public static void main(String[] args) {
        String word = "DENTIST";
        StringBuilder inverseWord = new StringBuilder();

        for (int i = word.length()-1; i >= 0; i--) {
            inverseWord.append(word.charAt(i));
        }
        System.out.println(inverseWord);

    }

}

如何反转字符串

5 个答案: