英文:
Read file line by line and Access values from List<List<String>> for below specifications in java
问题
以下5列字符字符串以制表符分隔的方式存储在文本文件中。
r1c1 = 文件名1 r1c2 = abc1 r1c3 = def1 r1c4 = ghi1 r1c5 = 列51
r2c1 = 文件名2 r2c2 = abc2 r2c3 = def2 r2c4 = ghi2 r2c5 = 列52
r3c1 = 文件名3 r3c2 = abc3 r3c3 = def3 r3c4 = ghi3 r3c5 = 列53
r4c1 = 文件名4 r4c2 = abc4 r4c3 = def4 r4c4 = ghi4 r4c5 = 列54
...
List<List
List
try (BufferedReader fileContent = new BufferedReader(new InputStreamReader(file))) {
while ((strLine = fileContent.readLine()) != null) {
List
// 将（r1c1 = 文件名1 r1c2 = abc1 r1c3 = def1 r1c4 = ghi1 r1c5 = 列51）作为列表值添加，然后在循环外部访问r1c1 = 文件名1作为值
for (int i = 0; i < line.size(); i++) {
data = Arrays.asList(strLine.split("\t"));
abc.add(aliveData);
}
}
}
获取以制表符分隔的文本文件中的5列字符字符串。
英文:
The following 5 columns of character strings are stored as text file separated by tab code.r1c1 = filename1 r1c2 = abc1 r1c3 = def1 r1c4 = ghi1 r1c5 = col51r2c1 = filename2 r2c2 = abc2 r2c3 = def2 r2c4 = ghi2 r2c5 = col52r3c1 = filename3 r3c2 = abc3 r3c3 = def3 r3c4 = ghi3 r3c5 = col53r4c1 = filename4 r4c2 = abc4 r4c3 = def4 r4c4 = ghi4 r4c5 = col54...List<List<String>> abc = new ArrayList<>();List<String> data = new ArrayList<String>();try(BufferedReader fileContent = new BufferedReader(new InputStreamReader(file))){while ((strLine = fileContent.readLine()) != null) {List<String> line = new LinkedList<>(Arrays.asList(strLine.split("\r?\n|\r")));// abc.add(r1c1 = filename1 r1c2 = abc1 r1c3 = def1 r1c4 = ghi1 r1c5 = col51) as// list value then access r1c1 = filename1 as a value outside the loopfor (int i = 0; i < line.size(); i++) {data = Arrays.asList(strLine.split("\t"));abc.add(aliveData);}}}
Get the 5 columns of character strings that are stored as text file separated by tab code.
答案1
得分: -1
public static void main(String[] args) throws FileNotFoundException {File file = new File("D:\\testout.txt");InputStream in = new FileInputStream(file);List<List<String>> splitByNewLine = convertInputStreamToString(in);for(List<String> data : splitByNewLine) {System.out.println(data);}}private static List<List<String>> convertInputStreamToString(InputStream file) {List<List<String>> fileData = new ArrayList<>();List<String> data = new ArrayList<String>();try (BufferedReader fileContent = new BufferedReader(new InputStreamReader(file))) {String strLine = null;while ((strLine = fileContent.readLine()) != null) {data = Arrays.asList(strLine.split("\t"));fileData.add(data);}} catch (IOException e) {System.out.println("InputError: %s" + e.getMessage());}return fileData;}
OUTPUT:
[r1c1 = filename1, r1c2 = abc1, r1c3 = def1, r1c4 = ghi1, r1c5 = col51] [r2c1 = filename2, r2c2 = abc2, r2c3 = def2, r2c4 = ghi2, r2c5 = col52] [r3c1 = filename3, r3c2 = abc3, r3c3 = def3, r3c4 = ghi3, r3c5 = col53] [r4c1 = filename4, r4c2 = abc4, r4c3 = def4, r4c4 = ghi4, r4c5 = col54]
<details><summary>英文:</summary>public static void main(String[] args) throws FileNotFoundException {File file = new File("D:\\testout.txt");InputStream in = new FileInputStream(file);List<List<String>> splitByNewLine = convertInputStreamToString(in);for(List<String> data : splitByNewLine) {System.out.println(data);}}private static List<List<String>> convertInputStreamToString(InputStream file) {List<List<String>> fileData = new ArrayList<>();List<String> data = new ArrayList<String>();try (BufferedReader fileContent = new BufferedReader(new InputStreamReader(file))) {String strLine = null;while ((strLine = fileContent.readLine()) != null) {data = Arrays.asList(strLine.split("\t"));fileData.add(data);}} catch (IOException e) {System.out.println("InputError: %s" + e.getMessage());}return fileData;}OUTPUT:`[r1c1 = filename1, r1c2 = abc1, r1c3 = def1, r1c4 = ghi1, r1c5 = col51][r2c1 = filename2, r2c2 = abc2, r2c3 = def2, r2c4 = ghi2, r2c5 = col52][r3c1 = filename3, r3c2 = abc3, r3c3 = def3, r3c4 = ghi3, r3c5 = col53][r4c1 = filename4, r4c2 = abc4, r4c3 = def4, r4c4 = ghi4, r4c5 = col54]`</details>
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