从文件中拆分行并存储为单独的数组值

Question

175 31  4   877108051
62  827 2   879373421
138 100 5   879022956
252 9   5   891456797
59  421 5   888206015

arr[1][1] = 175
arr[1][2] = 31
arr[1][3] = 2
arr[1][4] = 879373421

arr[2][1] = 62
arr[2][2] = 827
arr[2][3] = 4
arr[2][4] = 877108051

.
.
.

我能够使用StringTokenizer正确地拆分，但在令牌形成后无法访问单个元素。尝试使用array.split（），但它没有将值拆分为单独的数组值。请帮帮我。提前谢了。

我的代码

static public void main(String[] args) {

    File file = new File("small.txt");
    String[] lines = new String[100];
    FileReader reader = new FileReader(file);
    BufferedReader buffReader = new BufferedReader(reader);
    int x = 0;
    String s;

    while((s = buffReader.readLine()) != null){
            lines[x] = s;

                // Using StringTokenizer
        StringTokenizer st = new StringTokenizer(lines[x]);
        while (st.hasMoreTokens()){
            System.out.println("Next token:"+st.nextToken());
        }



        // Using Split() 
        String[] split1 = lines[x].split(" ");
        int size = split1.length;
        System.out.println("Split size:"+size);

        int i = 0;
        for (String value : split1) {

            System.out.println("Index:"+i+"  "+ value); i++;}
}

Answer 1

您可以将此代码简化很多。试试这样的东西。

1）逐行读取文件，边读边拆行，
向包含String[]的ArrayList添加值

2）关闭文件

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Arrays;

public class Test021 {

    static public void main(String[] args) throws Exception {

        File file = new File("small.txt");
        FileReader reader = new FileReader(file);
        BufferedReader buffReader = new BufferedReader(reader);
        String s = null;

        ArrayList<String[]> lst = new ArrayList<String[]>();
        String[][] res = null;

        while((s = buffReader.readLine()) != null){
            String[] arr = s.split("[\\s]+");
            lst.add(arr);
        }

        buffReader.close();

        res = new String[lst.size()][lst.get(0).length];
        res = lst.toArray(res);

        System.out.println();

        // System.out.println(res);

        // String result = Arrays.deepToString(res);
        // System.out.println(result);
        System.out.println();

        for (int i=0; i<res.length; i++){
            for (int j=0; j<res[i].length; j++){
                System.out.println("res[" + (i+1) + "][" + (j+1) + "]=" + res[i][j]);
            }
        }

        System.out.println();
    }

}

res[1][1]=175
res[1][2]=31
res[1][3]=4
res[1][4]=877108051
res[2][1]=62
res[2][2]=827
res[2][3]=2
res[2][4]=879373421
res[3][1]=138
res[3][2]=100
res[3][3]=5
res[3][4]=879022956
res[4][1]=252
res[4][2]=9
res[4][3]=5
res[4][4]=891456797
res[5][1]=59
res[5][2]=421
res[5][3]=5
res[5][4]=888206015