我有一个文本文件,该文件被读入列表,然后转换为数组。在文本文件中,每一行都是二维数组的元素。但是,从文本文件到数组的转换使元素的排列顺序错误,这与文件顺序不同。
到目前为止,这是我的代码:
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.*;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
/**
* @(#)ReadFromFile.java
*
*
* @author
* @version 1.00 2016/2/25
*/
public class ReadFromFile {
public static String[] readFile(String path){
try{
int i = 0;
int length = Files.readAllLines(Paths.get(path)).size();
String[] results = new String[length];
for(String line : Files.readAllLines(Paths.get(path))){
results[i++] = line;
}
return results;
} catch(IOException e) {
e.printStackTrace();
return null;
}
}
public static void main(String[] args) {
// Operation for Prescription File
String[] lines = readFile("prescription.txt");
String[] array = new String[7];
ArrayList<String> mylist = new ArrayList<String>();
for(String line : lines){
for (String s : line.split(" ")){
mylist.add(s);
}
}
String[] pre = mylist.toArray(array);// Stores the elements in prescription txt
System.out.println(Arrays.toString(pre));
// Operation for medicament file`enter code here`
String[] lines2 = readFile("medicaments.txt");
ArrayList<String> mylist2 =`enter code here` new ArrayList<String>();
int count = 0;// varıable for countıng lines of medicaments file
for(String line2 : lines2){
count++;
for (String s : line2.split(" ")){
mylist2.add(s);
}
}
String[] array2 = new String[count * 5];
String[] med = mylist2.toArray(array2);// Stores the elements in prescription txt
//Converting (medicaments.txt) 1d array into 2d array
String array2d[][] = new String[count][5];
for(int i=0; i<count;i++){
for(int j=0;j<5;j++){
array2d[i][j] = med[(j*count) + i];
}
}
System.out.println(Arrays.deepToString(array2d));
// Initialize array variables to compare
String medicine1 = pre[3];
String medicine2 = pre[5];
String numOfmedicine1 = pre[4];
String numOfmedicine2 = pre[6];
String socSecurity = pre[1];
String date = pre[1];
}
}
这是我的文字文件:
aspirin ssk 01.01.2016 31.01.2016 5.5
aspirin ssk 01.01.2016 31.01.2016 4
aspirin es 01.01.2016 31.01.2016 5.4
aspirin bk 01.01.2016 31.01.2016 6.1
aspirin ssk 01.01.2016 31.01.2016 5.4
novalgin ssk 01.01.2016 31.01.2016 8.3
每行中的输出元素以不同的顺序出现:
[[aspirin, ssk, 01.01.2016, 31.01.2016, 5.4], [ssk, 01.01.2016, 31.01.2016, 6.1, novalgin], [01.01.2016, 31.01.2016, 5.4, aspirin, ssk], [31.01.2016, 4, aspirin, ssk, 01.01.2016], [5.5, aspirin, bk, 01.01.2016, 31.01.2016], [aspirin, es, 01.01.2016, 31.01.2016, 8.3]]
我该如何纠正?
最佳答案
首先,您过于繁琐。您的整个readFile
函数不必要地将List<String>
转换为字符串数组,仅用于将其转换回。您的类应直接使用Files.readAllLines()
,避免直接使用数组来支持完整列表选项,并且应如下所示:
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.*;
import java.io.IOException;
public class ReadFromFile {
public static List<String> getWords(String path) {
try {
List<String> lines = Files.readAllLines(Paths.get(path));
List<String> words = new ArrayList<>(); //Use descriptive variable names!
for (String line : lines) {
for (String word : line.split(" ")) {
words.add(word);
System.out.println(word);
}
}
return words;
} catch (IOException e) {
//handle exception
return null; //This is not advised
}
}
public static void main(String[] args) {
List<String> prescription_words = getWords("prescription.txt");
List<String> medicaments_words = getWords("medicaments.txt");
List<List<String>> list2d = new ArrayList();
for (int idx=0; idx < medicaments_words.size(); idx++) {
// Iterate through your medications and add them to your 2dArray
}
}
}
现在,这不能解决两件事。首先,您的原始代码有两个文本文件,仅指定了其中一个(哪个?)。其次,您不清楚转换应如何实际发生:
for(int i=0; i<count;i++){
for(int j=0;j<5;j++){
array2d[i][j] = med[(j*count) + i];
}
}
您不清楚要在哪里结束(主要是因为
count
,i
和j
是不好的变量)。这更具可读性:for(int row=0; row < number_of_meds; row++){
for(int column=0; column < 5; column++){
index_of_medication = (column * number_of_meds) + row
array2d[row][column] = med[index_of_medication];
}
}
但这是一种奇怪的说法。您真正想要做的是遍历您的药物并将其放置在2d阵列中。您要做的就是首先设置外部数组,然后将元素添加到每个内部数组。
关于java - 2D阵列排序,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/35685693/