while循环提示多一个字而不是问

Question

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package controller;

import java.util.Scanner;

/**
 *
 * @author Donovan
 */
public class Controller {

    public Controller() {

        sentenceArray();
}

    private void sentenceArray() {
        int size = 0;
        String word = "";
        int i = 0;


        Scanner input = new Scanner(System.in);
            System.out.println("How many words would you like to enter?");
                size = input.nextInt();
                String [] sentence = new String[size];
                System.out.println("please enter a word.");
                word = input.next();



        while( i < size){

            if( i < size){
                sentence[i] = word;
                i++;
                System.out.println("Please enter a word.");

                word = input.next();

           }//end if
        }//end while

        displayArray(sentence);
    } // end sentence array


    public static void displayArray(String []sentence){
                System.out.print( "Your sentence is: " );

        for (String x : sentence){                
            System.out.print( x  + "\t" );
        }

    }//end displayResults


}//end controller

Answer 1

问题是你在i >= size之后要求输入。

具体来说，这些行

i++;
System.out.println("Please enter a word.");

word = input.next();

这不是C，所以你可以在方法调用中声明变量。

public void sentenceArray() {

    Scanner input = new Scanner(System.in);
    System.out.println("How many words would you like to enter?");
    int size = input.nextInt();
    String[] sentence = new String[size];

    int i = 0;
    while (i < size) {
        System.out.println("please enter a word.");
        String word = input.next();
        sentence[i] = word;
        i++;
    }

    displayArray(sentence);
}

Answer 2

do while循环

我会使用一个do while循环来测试循环体之后的条件，你不需要一个与你的循环一致的if，你也不需要临时的{{ 1}}。像，

String

最后，我想您在private void sentenceArray() { Scanner input = new Scanner(System.in); System.out.println("How many words would you like to enter?"); int size = input.nextInt(); String[] sentence = new String[size]; int i = 0; do { System.out.println("Please enter a word."); sentence[i] = input.next(); i++; } while (i < size); displayArray(sentence); } 的循环后想要println()。像，

displayArray

Answer 3

我的理解是你要求多余的“请输入一个字”？如果是，请删除上面的这些行：

System.out.println("please enter a word.");
word = input.next();

请在此处查看完整代码：

   public class Controller {

    public Controller() {
        sentenceArray();
    }

    private void sentenceArray() {
        int size = 0;
        int i = 0;

        Scanner input = new Scanner(System.in);
        System.out.println("How many words would you like to enter?");
        size = input.nextInt();
        String [] sentence = new String[size];

        while( i < size){
            System.out.println("Please enter a word.");
            sentence[i] = input.next();
            i++;
            //end if
        }//end while

        displayArray(sentence);
    } // end sentence array


    public static void displayArray(String []sentence){
        if(sentence.length > 0) {
            System.out.print( "Your sentence is: " );

            for (String x : sentence){                
                System.out.print( x  + "\t" );
            }
        }

    }//end displayResults

    public static void main(String[] args) {
        Controller controller = new Controller();
    }
}//end controller

希望得到这个帮助。