我有一個關(guān)于中斷輸入的問題，因?yàn)槲业拇a輸入兩次“-1”來停止輸入，實(shí)際上我想輸入一次“-1”來停止輸入，然后顯示數(shù)組輸出。下面是我的代碼：import java.util.Scanner;public class NewTMA {    public static float[][] clone(float[][] a) throws Exception {        float b[][] = new float[a.length][a[0].length];        for (int i = 0; i < a.length; i++) {            for (int j = 0; j < a[0].length; j++) {                b[i][j] = a[i][j];            }        }        return b;    }    public static void main(String args[]) {        Scanner sc = new Scanner (System.in);        System.out.println("enter row size");        int row =  Integer.parseInt(sc.nextLine());        System.out.println("enter column size");        int column = Integer.parseInt(sc.nextLine());        System.out.println ("Type float numbers two-dimensional array of similar type and size with line break, end by -1:");        float[][] a = new float[row][column];        for (int i=0; i<row; i++) {            for (int j=0; j<column; j++) {                String line = sc.nextLine();                if ("-1".equals(line)) {                    break;                }                a[i][j]=Float.parseFloat(line);            }         }        System.out.println("\n The result is:");        try {            float b[][] = clone(a);            for (int i = 0; i < a.length; i++) {                for (int j = 0; j < a[0].length; j++) {                    System.out.print(b[i][j] + " ");                }                System.out.println();            }        } catch (Exception e) {            System.out.println("Error!!!");        }    }}下面是我的輸出：   run: enter row size 3 enter column size 2 Type float numbers two-dimensional array of similar type and size with line breaks. end by -1: 1.4 2.4 -1 -1 The result is: 1.4 2.4  0.0 0.0  0.0 0.0  BUILD SUCCESSFUL (total time: 13 seconds)實(shí)際上我只想輸入一次“-1”來停止輸入，但我不知道為什么輸出顯示兩次“-1”來停止輸入。希望有人能幫助我找出我做錯的部分。謝謝。