Java: ScrollPanel

scrollBetList.getVerticalScrollBar().setValue(scrollBetList.getVerticalScrollBar().getMaximum());

Det virker desværre ikke helt :(

Prøv at se denne kode:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

class Main {

    private static JList betList;
    private static ArrayList<Double> betArray = new ArrayList<Double>();
    private static JScrollPane scrollBetList;
   
    public static void main(String[] args) {
        JFrame frame = new JFrame("Testing");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
       
        betList = new JList();
        betList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        scrollBetList = new JScrollPane(betList);
        scrollBetList.setPreferredSize(new Dimension(250,300));
        JButton addButton = new JButton("Tilføj");
       
        panel.add(scrollBetList);
        panel.add(addButton);
       
        frame.add(panel);
               
        for (int n = 0;n<50;n++) {
            addInt();
        }
       
        addButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ev) {
                addInt();
            }
        });

        frame.setSize(800,500);
        frame.setLocation(200,200);
        frame.setVisible(true);
    }
   
    public static void addInt() {
        betArray.add(Math.random());
        betList.setListData(betArray.toArray());
       
        betList.setSelectedIndex(betArray.size()-1);
        scrollBetList.getVerticalScrollBar().setValue(scrollBetList.getVerticalScrollBar().getMaximum());
    }

}

Som du kan se, så scroller den ikke helt i buden :(

Det virker desværre ikke helt :(

Prøv at se denne kode:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

class Main {

    private static JList betList;
    private static ArrayList<Double> betArray = new ArrayList<Double>();
    private static JScrollPane scrollBetList;
   
    public static void main(String[] args) {
        JFrame frame = new JFrame("Testing");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
       
        betList = new JList();
        betList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        scrollBetList = new JScrollPane(betList);
        scrollBetList.setPreferredSize(new Dimension(250,300));
        JButton addButton = new JButton("Tilføj");
       
        panel.add(scrollBetList);
        panel.add(addButton);
       
        frame.add(panel);
               
        for (int n = 0;n<50;n++) {
            addInt();
        }
       
        addButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent ev) {
                addInt();
            }
        });

        frame.setSize(800,500);
        frame.setLocation(200,200);
        frame.setVisible(true);
    }
   
    public static void addInt() {
        betArray.add(Math.random());
        betList.setListData(betArray.toArray());
       
        betList.setSelectedIndex(betArray.size()-1);
        scrollBetList.getVerticalScrollBar().setValue(scrollBetList.getVerticalScrollBar().getMaximum());
    }

}

Som du kan se, så scroller den ikke helt i buden :(

Beklager - der skete vist en lille fejl :(

.lukker