Question

import java.io.*;   import java.lang.*;
public class basics{

    String input()throws IOException{
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);

        String type=br.readLine();
        return  type;
    }

    String work(String S){
        int whitespace; int count=0;    String wrd=new String[5]
        int lenghth=S.length();
        int t=0;
        while(t<length){
            if(S.charAt(t)=='') {   
                whitespace++;
                count++;
            }
            else{
                wrd[count]+=S.charAt(t);
            }
            Random rand = new Random();
            int  n;
            String blank="";
            for(int j=1;j<6;j++){
                n = rand.nextInt(4) + 0;
                blank.append(wrd[n]);
            }
            return blank;
        }
    }

    public static void main(String args[])throws IOException{
        System.out.println("enter a sentence of five words");
        String x;   x.input();  
        String output=work(x);
        System.out.println(output);
    }
}

这段代码是混淆五个单词的单词并产生输出，问题就是这个方法不能返回字符串，该怎么办？

Answer 1

正确缩进代码后，您可以看到return方法中的while(t<length)之外没有work语句。如果该情况没有输出，则返回空字符串或抛出异常。

String work(String S){
    int whitespace; int count=0;    String wrd=new String[5]
    int lenghth=S.length();
    int t=0;
    while(t<length){
        if(S.charAt(t)=='') {   
            whitespace++;
            count++;
        }
        else{
            wrd[count]+=S.charAt(t);
        }
        Random rand = new Random();
        int  n;
        String blank="";
        for(int j=1;j<6;j++){
            n = rand.nextInt(4) + 0;
            blank.append(wrd[n]);
        }
        return blank;
    }
    //HERE
    return ""; // or return a proper default value
}

无法在Java中返回String

1 个答案: