Java Swing How to - Set the number of visible rows in JList

Question

We would like to know how to set the number of visible rows in JList.

Answer

import java.awt.BorderLayout;
/*  w  ww.j  a va 2  s.c o m*/
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;

public class Main {
  public static void main(String args[]) {
    String labels[] = { "A", "B", "C", "D", "E", "F" ,"G","H","I","J"};

    JFrame frame = new JFrame("Sizing Samples");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JList jlist1 = new JList(labels);
    jlist1.setVisibleRowCount(4);
    DefaultListModel model = new DefaultListModel();
    model.ensureCapacity(100);
    for (int i = 0; i < 100; i++) {
        model.addElement(Integer.toString(i));
    }
    JScrollPane scrollPane1 = new JScrollPane(jlist1);
    frame.add(scrollPane1, BorderLayout.NORTH);

    JList jlist2 = new JList(model);
    jlist2.setVisibleRowCount(4);
    jlist2.setFixedCellHeight(12);
    jlist2.setFixedCellWidth(200);

    JScrollPane scrollPane2 = new JScrollPane(jlist2);
    frame.add(scrollPane2, BorderLayout.CENTER);

    JList jlist3 = new JList(labels);
    jlist3.setVisibleRowCount(4);
    frame.add(jlist3, BorderLayout.SOUTH);

    frame.setSize(300, 350);
    frame.setVisible(true);
  }
}