Creating List in Java using SWT
This section illustrates you how to create a list of certain items using the
Standard Widget Toolkit
In this example, we have create a list of certain items using SWT that
provides the class List of package org.eclipse.swt.widgets to
create the list in Java language.
The style SWT.MULTI provided by the List class is used to select
multiple items from the list. The method list.add() adds the array to the
list and the
method list.getSelectionIndex() returns the index of selected item. Go
through the below given example code that illustrates, how to create list of
items in Java.
Here is the code of ListExample.java
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.RowLayout;
public class ListExample {
Display display = new Display();
Shell shell = new Shell(display);
public ListExample() {
RowLayout rowLayout = new RowLayout();
shell.setLayout(rowLayout);
shell.setText("List");
(new Label(shell, SWT.NULL)).setText("Which game you like most? ");
final List list = new List(shell, SWT.MULTI | SWT.V_SCROLL);
final Text text = new Text(shell, SWT.BORDER);
String[] sports = new String[]{"Chess", "Cricket", "FootBall",
"Lawn Tennis","Badminton","Hockey","BasketBall","Golf","Table
Tennis","VolleyBall"};
for(int i=0; i<sports.length; i++)
list.add(sports[i]);
list.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
System.err.println(list.getSelectionIndex());
int[] indices = list.getSelectionIndices();
String[] items = list.getSelection();
StringBuffer buffer = new StringBuffer(" ");
for(int i=0; i < indices.length; i++) {
buffer.append(items[i]);
if(i == indices.length-1)
buffer.append('.');
else
buffer.append(", ");
}
System.out.println(buffer.toString());
text.setText(buffer.toString());
}
public void widgetDefaultSelected(SelectionEvent e) {
int[] indices = list.getSelectionIndices();
String[] items = list.getSelection();
StringBuffer buffer = new StringBuffer(" ");
for(int i=0; i < indices.length; i++) {
buffer.append(items[i]);
if(i == indices.length-1)
buffer.append('.');
else
buffer.append(", ");
}
System.out.println(buffer.toString());
text.setText(buffer.toString());
}
});
shell.pack();
shell.setSize(350,180);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
public static void main(String[] args) {
new ListExample();
}
} |
Output will be displayed as:
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