My jave code can read the the text file completely, but how I can make it scan the text file and show it has some corrupted codes ??
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;
import javax.swing.JFileChooser;
/**
*
* @author
*/
public class NewMain {
public static void main(String[] args) throws IOException
{
// Use file dialog to select file.
JFileChooser chooser = new JFileChooser();
int result = chooser.showOpenDialog(null);
// This assumes user pressed Open
// Get the file from the file
File file = chooser.getSelectedFile();
// Open the file
FileReader reader = new FileReader(file);
// Use read, which returns an int
int i = reader.read();
while (i != -1)
{
// Convert to char and print
char ch = (char)i;
System.out.print(ch);
// Get next from read()
i = reader.read();
}
// reader.close();
}
}
}
The Text file has:
0.2064213252847991ZONK6, 48, 32, 81 // corrupted code
0.9179703041697693, 36, 58, 3, 68
0.10964659705625479, 74, 89, 69, 39
0.322267984407108, 27, 87, 89, 69
0.228123305601ZONK5, 76, 48, 23, 78 // corrupted code
Any code in the text file that has ZONK is the corrupted one
Read the javadoc: Scanner has a constructor taking a File as argument .
Constructs a new Scanner that produces values scanned from the specified file.
Better use BufferedReader
which can read line by line like this.
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Scanner;
import javax.swing.JFileChooser;
public class NewMain {
public static void main(String[] args) throws IOException{
// Use file dialog to select file.
JFileChooser chooser = new JFileChooser();
int result = chooser.showOpenDialog(null);
// This assumes user pressed Open
// Get the file from the file
File file = chooser.getSelectedFile();
// Open the file
java.io.BufferedReader reader = new java.io.BufferedReader(new java.io.FileReader(file));
String line = reader.readLine();
while (line != null){
System.out.print(line);
if (line.contains("ZONK")){
System.out.println(" // corrupted code");
}else{
System.out.println("");
}
line = reader.readLine();
}
reader.close();
}
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.