JTextArea Problems

[Amy Phillips]

Hi,
I am having a coupld of problems with my JTextAreas. Firstly I am trying to create a form with various fields and labels. Everything is working ok but I need 3 JTextAreas one above the other and I can only seem to get 1 - prehaps the others are underneath. I can't seem to control the height of the JTextArea.
Here is the code

 
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
public class CreateTest
{
    public static void main( String args[] )
    {
        JFrame tframe = new TestFrame();
tframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
tframe.show();
    }
}
class TestFrame extends JFrame
{
    private static final int WIDTH = 500;
private static final int HEIGHT = 400;


public TestFrame()
{
    setTitle("Enter New Test");
setSize(WIDTH, HEIGHT);
Container contentPane = getContentPane();
GridBagLayout layout = new GridBagLayout();
contentPane.setLayout (layout);

//create form objects
JLabel titleLabel = new JLabel("Create a New Test");
JLabel directLabel = new JLabel("Please complete the form and click 'Create Test'");
JLabel mandLabel = new JLabel("Fields marked with * are mandatory");

JLabel nameLabel = new JLabel("* Test Name: ");
JTextField nameField = new JTextField(20);
JLabel typeLabel = new JLabel("  Test Type: ");
JTextField typeField = new JTextField(20);
JLabel moduleLabel = new JLabel("  Project Module: ");
JTextField moduleField = new JTextField(20);
JLabel descripLabel = new JLabel("  Test Description: ");
JTextArea descripField = new JTextArea(20, 1);

JLabel exResultLabel = new JLabel("* Expected Test Result: ");
JTextArea exResultField = new JTextArea(20, 1);
JLabel objectiveLabel = new JLabel("* Test Objective: ");
JTextArea objectiveField = new JTextArea(20, 1);

JButton clearButton = new JButton("Clear Form");
JButton createButton = new JButton("Create Test");
//add components to the grid
GridBagConstraints constraints = new GridBagConstraints();

constraints.fill = GridBagConstraints.NONE;
constraints.anchor = GridBagConstraints.CENTER;
constraints.weightx = 0;
constraints.weighty = 0;

add(titleLabel, constraints, 1, 1, 1, 1);
add(directLabel, constraints, 1, 2, 1, 1);
add(mandLabel, constraints, 1, 3, 1, 1);

constraints.fill = GridBagConstraints.NONE;
constraints.anchor = GridBagConstraints.WEST;
constraints.weightx = 0;
constraints.weighty = 5;

add(nameLabel, constraints, 0, 4, 1, 1);
add(typeLabel, constraints, 0, 5, 1, 1);
add(moduleLabel, constraints, 0, 6, 1, 1);
add(descripLabel, constraints, 0, 7, 1, 1);
add(exResultLabel, constraints, 0, 14, 1, 1);
add(objectiveLabel, constraints, 0, 20, 1, 1);

constraints.fill = GridBagConstraints.HORIZONTAL;
constraints.anchor = GridBagConstraints.CENTER;
constraints.weightx = 0;
constraints.weighty = 5;

add(nameField, constraints, 1, 4, 1, 1);
add(typeField, constraints, 1, 5, 1, 1);
add(moduleField, constraints, 1, 6, 1,1);

constraints.fill = GridBagConstraints.BOTH;
constraints.anchor = GridBagConstraints.CENTER;
constraints.weightx = 0;
constraints.weighty = 0;

add(descripField, constraints, 1, 7, 1, 1);
add(exResultField, constraints, 1, 14, 1, 1);
add(objectiveField, constraints, 1, 20, 1, 1);

constraints.fill = GridBagConstraints.NONE;
constraints.anchor = GridBagConstraints.CENTER;
constraints.weightx = 0;
constraints.weighty = 0;

add(clearButton, constraints, 0,21, 1, 1);
add(createButton, constraints, 1, 21, 1, 1);

}

//method to add a given component to the grid with the 
public void add(Component c, GridBagConstraints constraints, 
    int x, int y, int w, int h)
{
    constraints.gridx = x;
    constraints.gridy = y;
    constraints.gridwidth = w;
    constraints.gridheight = h;
    getContentPane().add(c, constraints);
}
} 

Secondly is it possible to prevent the user pressing the retun key to start a new line in a JTextArea, or is it possible to prvent my JTextArea from resizing if they do press it?
Thanks very much

[Jose Botella]

I hope this code is near to what you expect:

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
public class CreateTest2
{
  public static void main( String args[] )
  {
    JFrame tframe = new TestFrame2();
    tframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    tframe.show();
  }
}
  
class TestFrame2 extends JFrame
{
  private static final int WIDTH = 500;
  private static final int HEIGHT = 400;
  
  
  public TestFrame2()
  {
    setTitle("Enter New Test");
    setSize(WIDTH, HEIGHT);
    
    Container contentPane = getContentPane();
    GridBagLayout layout = new GridBagLayout();
    contentPane.setLayout (layout);
    
    //create form objects
    JLabel titleLabel = new JLabel("Create a New Test");
    JLabel directLabel = new JLabel("Please complete the form and click 'Create Test'");
    JLabel mandLabel = new JLabel("Fields marked with * are mandatory");
    
    JLabel nameLabel = new JLabel("* Test Name: ");
    JTextField nameField = new JTextField(20);
    JLabel typeLabel = new JLabel(" Test Type: ");
    JTextField typeField = new JTextField(20);
    
    JLabel moduleLabel = new JLabel(" Project Module: ");
    JTextField moduleField = new JTextField(20);
    JLabel descripLabel = new JLabel(" Test Description: ");
    JTextArea descripField = new JTextArea(20, 3);
    JScrollPane descrip = new JScrollPane(descripField);
    descripField.setLineWrap(true);
    descripField.setWrapStyleWord(true);
    
    JLabel exResultLabel = new JLabel("* Expected Test Result: ");
    JTextArea exResultField = new JTextArea(20, 3);
    JScrollPane exResult = new JScrollPane(exResultField);
    exResultField.setLineWrap(true);
    exResultField.setWrapStyleWord(true);    
    
    JLabel objectiveLabel = new JLabel("* Test Objective: ");
    JTextArea objectiveField = new JTextArea(20, 3);
    JScrollPane objective = new JScrollPane(objectiveField);
    objectiveField.setLineWrap(true);
    objectiveField.setWrapStyleWord(true);
    
    JButton clearButton = new JButton("Clear Form");
    JButton createButton = new JButton("Create Test");
    
    //add components to the grid
    GridBagConstraints constraints = new GridBagConstraints();
    
    constraints.fill = GridBagConstraints.NONE;
    constraints.anchor = GridBagConstraints.CENTER;
    constraints.weightx = 0;
    constraints.weighty = 0;
    constraints.insets = new Insets(0,0,5,0);
    
    add(titleLabel, constraints, 1, 1, 1, 1);
    add(directLabel, constraints, 1, 2, 1, 1);
    add(mandLabel, constraints, 1, 3, 1, 1);
    add(nameLabel, constraints, 0, 4, 1, 1);
    add(typeLabel, constraints, 0, 5, 1, 1);
    add(moduleLabel, constraints, 0, 6, 1, 1);
    
    constraints.fill = GridBagConstraints.NONE;
    constraints.anchor = GridBagConstraints.WEST;
    constraints.weightx = 0;
    constraints.weighty = 0.2;//
    
    add(descripLabel, constraints, 0, 7, 1, 1);
    add(exResultLabel, constraints, 0, 8, 1, 1);
    add(objectiveLabel, constraints, 0, 9, 1, 1);
    
    constraints.fill = GridBagConstraints.HORIZONTAL;
    constraints.anchor = GridBagConstraints.CENTER;
    constraints.weightx = 0;
    constraints.weighty = 0;//
    
    add(nameField, constraints, 1, 4, 1, 1);
    add(typeField, constraints, 1, 5, 1, 1);
    add(moduleField, constraints, 1, 6, 1,1);
    
    constraints.fill = GridBagConstraints.BOTH;//
    constraints.anchor = GridBagConstraints.CENTER;
    constraints.weightx = 0;
    constraints.weighty = 0.2;
    
    add(descrip, constraints, 1, 7, 1, 1);
    add(exResult, constraints, 1, 8, 1, 1);
    add(objective, constraints, 1, 9, 1, 1);
    
    constraints.fill = GridBagConstraints.NONE;
    constraints.anchor = GridBagConstraints.CENTER;
    constraints.weightx = 0;
    constraints.weighty = 0;
    
    add(clearButton, constraints, 0,10, 1, 1);
    add(createButton, constraints, 1, 10, 1, 1);
  
  }
  
  //method to add a given component to the grid with the
  public void add(Component c, GridBagConstraints constraints,
  int x, int y, int w, int h)
  {
    constraints.gridx = x;
    constraints.gridy = y;
    constraints.gridwidth = w;
    constraints.gridheight = h;    
    getContentPane().add(c, constraints);
  }
} 

GridBagLayout is very tricky. Maybe this post can help to understand it.
For an introduction look at the Java Tutorial

[Amy Phillips]

Thank you very much! Its looking perfect