Thread: Class in class

i have this code here:

import java.io.*
 
public class ReadLastLine {
 
 public static void main(String[] args) throws Exception {
 
  FileInputStream in = new FileInputStream("test.txt");
  BufferedReader br = new BufferedReader(new InputStreamReader(in));
 
  String strLine = null, tmp;
 
  while ((tmp = br.readLine()) != null)
  {
     strLine = tmp;
  }
 
  String lastLine = strLine;
 
  System.out.println(lastLine);
 
  in.close();
 
 
 }
}

and i want to call the function lastLine in a other class, how am i supposed to do that?

what you asking is not clear are you suppose to like this :
import java.io.*;

public class ReadLastLine {

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

FileInputStream in = new FileInputStream("D:/123/test.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(in));

String strLine = null, tmp;

while ((tmp = br.readLine()) != null)
{
strLine = tmp;
}

String lastLine = strLine;

System.out.println(lastLine);
LastLine l = new LastLine(lastLine);

in.close();

}
}

class LastLine{
public LastLine(String str){
System.out.println("LastName is ------"+str);
}
}

i have my first method

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;  
 
public class login implements ActionListener  {
 
	//Center
	public final JTextArea Center = new JTextArea(400, 500); //laver en final fordi ellers kan action center ikke finde værdien
 
	public void actionPerformed(ActionEvent event) {
 
//East
		JPanel East = new JPanel(new GridLayout(8,2));
		East.add(konti1);
		East.add(new JLabel((new ReadLastLine().getValue())));     // here is where i want the last line output
		East.add(konti2);
		East.add(new JLabel("Tilrådighed"));
		East.add(new JButton("Konti"));
		East.add(new JLabel("Tilrådighed"));
		East.add(new JButton("Konti"));
		East.add(new JLabel("Tilrådighed"));
		East.add(new JLabel(""));
		East.add(new JLabel(""));
		East.add(new JLabel(""));
		East.add(new JLabel(""));
		East.add(new JLabel(""));
		East.add(new JLabel(""));
		East.add(new JLabel(""));
		East.add(new JLabel(""));

and then i have my other method

	public class readLastLine{
		public String readLastLine(){
		FileInputStream in = new FileInputStream("test.txt");
 	   BufferedReader br = new BufferedReader(new InputStreamReader(in));
 
 		String strLine = null, tmp;
 
 		while ((tmp = br.readLine()) != null){
     		strLine = tmp;
  		}
 
  		String lastLine = strLine;
 
  		in.close();
		return lastLine;
 
		}
 
	}

but i simple can't get it to print the last line it just comes up with a different error everytime i try