Yurttas/PL/OOL/Java/F/05/02/05/01/NameFile01.java

  1/**
  2 *  Copyright(C) 1998
  3 *  All Rights Reserved. Salih Yurttas, ZCubes, BitsOfCode Software Systems, Inc..
  4 *
  5 *  Permission to use, copy, modify, and distribute this
  6 *  software and its documentation for EDUCATIONAL purposes
  7 *  and without fee is hereby granted provided that this
  8 *  copyright notice appears in all copies.
  9 *
 10 *  @date   : January 1, 1998.
 11 *  @author : Salih Yurttas.
 12 */
 13
 14
 15import java.awt.*;
 16import java.awt.event.*;
 17
 18import java.io.*;
 19
 20public class NameFile01 extends Frame 
 21                        implements ActionListener {
 22  
 23  public static void main(String[] args)
 24    throws IOException
 25  {
 26    Frame f = new NameFile01();
 27
 28    f.setSize(400, 200);   // frame size set
 29    f.setVisible(true);    // frame displayed
 30  }
 31
 32  private int NP = 2;
 33  private Button[] bList = new Button[NP];
 34  private TextField[] tFList = new TextField[NP];
 35
 36  private static IntegerList givenList;
 37
 38  class WindowEventClosing extends WindowAdapter {
 39    public void windowClosing(WindowEvent e) {
 40      System.exit (0);
 41    }
 42  }
 43
 44  public NameFile01() 
 45    throws IOException
 46  {
 47    setTitle("FileNameUI00");
 48    this.addWindowListener(new WindowEventClosing());
 49
 50    setLayout(new FlowLayout());
 51
 52    Panel[] pList = new Panel[NP]; // create panels.
 53    for(int i=0; i<NP; i++)
 54      pList[i] = new Panel();
 55
 56    String[] lList = {"Input  Filename",
 57                      "Output Filename"};
 58
 59    for(int i=0; i<NP; i++) {
 60      tFList[i] = new TextField("", 24);
 61      tFList[i].addActionListener(this);
 62      pList[i].add(tFList[i]);         // add textfields to the panels.
 63      bList[i] = new Button(lList[i]); // create buttons with labels.
 64      bList[i].addActionListener(this);
 65      pList[i].add(bList[i]);          // add buttons to the panels.
 66      add(pList[i]);                   // add panels to the frame.
 67    }
 68    tFList[0].setText("Enter input filename");
 69    tFList[1].setEditable(false);
 70    bList[1].setEnabled(false);
 71  }
 72
 73  public void actionPerformed(ActionEvent e) {
 74    String arg = e.getActionCommand();
 75
 76    if (arg.equals("Input  Filename")) {
 77      try {
 78        String inFileName = tFList[0].getText();
 79        givenList = new IntegerList();
 80        givenList.getIntegerList(inFileName);
 81
 82        tFList[0].setEditable(false);
 83        bList[0].setEnabled(false);
 84        tFList[0].setText("Input File is OK.");
 85        tFList[1].setText("Enter output filename");
 86        tFList[1].setEditable(true); 
 87        bList[1].setEnabled(true);
 88      }
 89      catch (IOException ioe) {
 90        System.out.println("Error: " + ioe);
 91        System.exit(0);
 92      }
 93    }
 94    else {
 95      try {
 96        String outFileName = tFList[1].getText();
 97        givenList.putIntegerList(outFileName);
 98
 99        tFList[1].setEditable(false);
100        bList[1].setEnabled(false);
101        tFList[1].setText("Output File is OK.");
102        tFList[0].setText("Enter input filename");
103        tFList[0].setEditable(true); 
104        bList[0].setEnabled(true);
105      }
106      catch (IOException ioe) {
107        System.out.println("Error: " + ioe);
108        System.exit(0);
109      } 
110    }
111  }
112
113}