search data from FileReader in Java

Question

hi I'm new in java

how to read and search data from file (txt) and then display the data in TextArea or Jtable. for example I have file txt contains data and I need to display this data in textarea after I clicked a button, I have used FileReader , and t1 t2 tp are attributes in the file

 import java.io.FileReader;
 import java.io.IOException;

 String t1,t2,tp;    
Ffile f1= new Ffile();
FileReader fin = new FileReader("test2.txt");

Scanner src = new Scanner(fin);

while (src.hasNext()) {
     t1 = src.next();
     textarea.setText(t1);
     t2 = src.next();
     textarea.setText(t2);
     tp = src.next();
     textarea.setText(tp);

     f1.insert(t1,t2,tp);
}

fin.close();

also I have used the inputstream

    DataInputStream dis = null;
    String dbRecord = null;

    try { 

       File f = new File("text2.text");
       FileInputStream fis = new FileInputStream(f); 
       BufferedInputStream bis = new BufferedInputStream(fis); 
       dis = new DataInputStream
       while ( (dbRecord = dis.readLine()) != null) {
        StringTokenizer st = new StringTokenizer(dbRecord, ":");
          String t1 = st.nextToken();
          String t2 = st.nextToken();
          String tp  = st.nextToken();
          textarea.setText(textarea.getText()+t1);
          textarea.setText(textarea.getText()+t2);
          textarea.setText(textarea.getText()+tp);

      }


    } catch (IOException e) { 
       // catch io errors from FileInputStream or readLine() 
       System.out.println("Uh oh, got an IOException error: " + e.getMessage()); 

    } finally { 
    }

but both of them don't work ,so please any one help me I want to know how to read data and also search it from file and i need to display the data in textarea .

thanks in advance

---

update the question

---

Firstly, thank you so much for those who answered my question.

secondly, To explain more , I want to read data from a file and display it in a TextArea so anyone have code to do this please show it to me becuase I have tried a lot and I still have same problem.

Answer 1

textArea.setText(...);

replaces the existing text in the text area. I think you are looking for

textArea.append(...);

Answer 2

//Import necessary packages public class FileRead implements ActionListener { JFrame jf=new JFrame("Sample"); JTextArea jt=new JTextArea(); JButton jb=new JButton("Click Me"); public FileRead() { jf.setSize(300,200); jt.setLayout(new BorderLayout());
jf.add(jb,BorderLayout.NORTH); jf.add(jt,BorderLayout.CENTER); jb.addActionListener(this); jf.setVisible(true); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

} public static void main(String as[]) { new FileRead(); }

public void actionPerformed(ActionEvent e) {
    if(e.getSource()==jb)
    {
    File f=new File("D:\\a.txt");
try
{
Scanner s=new Scanner(f);
while(s.hasNext())
{
    jt.append(s.nextLine());
    jt.append("\n");
}
}
catch(Exception ex)
{
    System.out.println(""+ex);
}
}
}

}