How to use Tables in Java?

[Rob Dizzle]

Hello friends,
Last time you guys solved my query for that I am very thankful. I need your help now also. I have just started the Java after completing the HTML and C++ programming language. I Java, I have done some basic programs by using some methods and functions. I want to use the table, so that I can display the list of the students to the user. But I don't know how to use..?! So please tell me how to use Tables in Java.?? Hoping that this time also you will help me soon..!!

[Warner]

In Java, you can display tables of data by using the JTable class. JTable simply view your data and your data is not cached by that class. You can use the following code for creating the data.

    String[] columnNames = {"Name",
                            "Place",
                            "Game",
                            "Age",
                            "Color"};

Its data is initialized and stored in a two-dimensional Object array:

    Object[][] data = {
        {"Nuyrew", "California",
         "Snowboarding", new Integer(7), new Boolean(false)},
        {"Fyun", "Humi",
         "Rowing", new Integer(5), new Boolean(true)},
        {"Kathy", "Indies",
         "Knitting", new Integer(4), new Boolean(false)},
        {"Sharon", "Zakhour",
         "Speed reading", new Integer(20), new Boolean(true)},
        {"Philip", "Milan",
         "Pool", new Integer(10), new Boolean(false)}
    };

[Allan.d]

The JTable constructors has two types, they are :

1. JTable(Object[][] rowData, Object[] columnNames)
2. JTable(Vector rowData, Vector columnNames)

The above mentioned constructors are very easy to use. Some disadvantages of them are :

1. After using that constructor every cell automatically becomes editable.
2. They treat all data types the same and that too all as strings.

[Modifier]

If the table that you are using is without the scroll pane, then you must get the table header component and place it yourself. The following code will help you for this :

container.setLayout(new BorderLayout());
container.add(table.getTableHeader(), BorderLayout.PAGE_START);
container.add(table, BorderLayout.CENTER);

[Praetor]

You can use the following code for the table :

TableColumn column = null;
for (int i = 0; i < 5; i++) {
    column = table.getColumnModel().getColumn(i);
    if (i == 2) {
        column.setPreferredWidth(100);
    } else {
        column.setPreferredWidth(50);
    }
}