[英]Read txt and add in jtable
I am new to java and I need to create a program that reads text from a txt file and puts it into a jtable, the format in the txt file will be like "b3:42". 我是Java的新手,我需要创建一个程序来从txt文件读取文本并将其放入jtable,该txt文件中的格式类似于“ b3:42”。 And I need to read those and put b3 in the first column of the table and 42 in the next column.
我需要阅读这些内容,并将b3放在表的第一列中,然后将42放在下一列中。 Could you help me ?
你可以帮帮我吗 ? And sorry for my english.
对不起,我的英语。
you can refer below code . 您可以参考以下代码。
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import javax.swing.*;
public class HelloWorld{
private static final String FILENAME = "input.txt";
public static void main(String []args){
BufferedReader br = null;
FileReader fr = null;
try {
fr = new FileReader(FILENAME);
br = new BufferedReader(fr);
String s;
String[][] data = new String[2][2];
br = new BufferedReader(new FileReader(FILENAME));
int i = 0;
while ((s = br.readLine()) != null) {
data[i]= s.split(":");
i++;
}
String column[]={"COL1","COL2"};
JTable jt=new JTable(data,column);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)
br.close();
if (fr != null)
fr.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
}
Some suggestions 一些建议
You can read txt file line by line using BufferedReader and related chained stream in this way: 您可以使用BufferedReader和相关链式流以这种方式逐行读取txt文件:
public class TestSO {
public static void main(String[] args) {
String line = "";
try(BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("yourfile.txt")))){
while ((line = br.readLine()) != null) {
// Process the line
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
In order to split your line into pieces you need you must use line.split(":") You get 2 tokens, the one before the colon and the one after it. 为了将行分成几部分,您必须使用line.split(“:”)获得2个标记,一个标记在冒号之前,另一个在冒号之后。
String tokens[] = line.split(":");
According to JTable documentation you can create a JTable as JTable(Object[][] rowData, Object[] columnNames) 根据JTable文档,您可以将JTable创建为JTable(Object [] [] rowData,Object [] columnNames)。
So you can use tokens you read and parsed above to create the rowData array. 因此,您可以使用上面读取和解析的标记来创建rowData数组。
Then create the array for the column names: 然后为列名称创建数组:
//headers for the table
String[] columns = new String[] {
"Col1", "Col2"
};
At the end just creare the JTable passing it the arrays with data and column names: 最后,创建JTable,将包含数据和列名称的数组传递给JTable:
//create table with data
JTable table = new JTable(rowData, columnNames);
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