search data from FileReader in Java

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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

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update the question

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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 pro开发者_如何转开发blem.

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textArea.setText(...);

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

textArea.append(...);

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//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);
}
}
}

}