所以我在尝试弄清楚如何将滚动条添加到我的Jframe窗口时遇到了一些问题。我想出了如何做到这一点，但是当我实现它时，所有应该出现在框架中的组件都没有，所以我得到了一个空白框架。如何使我的框架可滚动？
这里是我的GUI代码：
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import javax.swing.*;
public class FirstGUI2 {
private Container pane;
final boolean fill = true;
final boolean weightX = true;
final boolean RIGHT_TO_LEFT = false;
public String mon = "";
public String tues = "";
public String wed = "";
public String thu = "";
public String fri = "";
private JTextArea textAreaMon = new JTextArea(mon);
private JTextArea textAreaTue = new JTextArea(tues);
private JTextArea textAreaWed = new JTextArea(wed);
private JTextArea textAreaThu = new JTextArea(thu);
private JTextArea textAreaFri = new JTextArea(fri);
private JTextArea description;
public void addComponents(Container pane) {
if (RIGHT_TO_LEFT)
pane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
JButton button;
pane.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.weightx = 1;
c.fill = GridBagConstraints.HORIZONTAL;
button = new JButton("Open File");
c.gridx = 1;
c.gridy = 1;
c.insets = new Insets(5, 5, 5, 5);
pane.add(button, c);
textAreaMon = new JTextArea(mon);
// textAreaMon.append(mon.substring(0));
textAreaMon.setLineWrap(true);
textAreaMon.setEditable(false);
c.gridx = 1;
c.gridy = 2;
//JScrollPane scroll = new JScrollPane(textAreaMon);
pane.add(textAreaMon, c);
textAreaTue = new JTextArea(tues);
textAreaTue.setLineWrap(true);
textAreaTue.setEditable(false);
c.gridx = 1;
c.gridy = 3;
pane.add(textAreaTue, c);
textAreaWed = new JTextArea(wed);
textAreaWed.setLineWrap(true);
textAreaWed.setEditable(false);
c.gridx = 1;
c.gridy = 4;
pane.add(textAreaWed, c);
textAreaThu = new JTextArea(thu);
textAreaThu.setLineWrap(true);
textAreaThu.setEditable(false);
c.gridx = 1;
c.gridy = 5;
pane.add(textAreaThu, c);
textAreaFri = new JTextArea(fri);
textAreaFri.setLineWrap(true);
textAreaFri.setEditable(false);
c.gridx = 1;
c.gridy = 6;
pane.add(textAreaFri, c);
description = new JTextArea(
"\n Click the open button in order to select and im"
+ "port your .csv file. Your scehdule and times will be displayed in the schedule below.\n");
description.setEditable(false);
c.gridx = 1;
c.gridy = 0;
pane.add(description, c);
// attaching the file opener to the open file button
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
new InterfacePanel();
//textAreaMon.setText(mon);
makeGUI();
}
});
}
// creates the frame and showing the GUI to the user
public static void makeGUI() {
JFrame frame = new JFrame("Final Exam Scheduler");
frame.setSize(1000, 1000);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel();
FirstGUI2 add = new FirstGUI2();
JScrollPane pane = new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
add.addComponents(frame.getContentPane());
frame.setContentPane(pane);
add.printToGUI();
frame.pack();
frame.setVisible(true);
}
public void printToGUI() {
// JText Fields
mon = "Monday: \n \n 8:00 - 10:00:\t Group Exam 1 \n 10:15-12:15:\t Group Exam 2 \n 12:45 - 2:45:\t";
// while (!ArrayListsForClasses.time1.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time1.size(); i++) {
mon += ArrayListsForClasses.time1.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time1.get(i).displayCourse());
mon += ", ";
}
//}
mon += "\n 3:00 - 5:00:\t";
//while (!ArrayListsForClasses.time2.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time2.size(); i++) {
mon += ArrayListsForClasses.time2.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time2.get(i).displayCourse());
mon += ", ";
}
//}
mon += "\n 5:30 - 7:30:\t Group Exam 3 \n 7:45 - 9:45:\t";
//while (!ArrayListsForClasses.time3.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time3.size(); i++) {
mon += ArrayListsForClasses.time3.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time3.get(i).displayCourse());
mon += ", ";
}
//}
mon += "\n \n";
textAreaMon.setText(mon);
// textAreaTues
tues = "Tuesday: \n \n 8:00 - 10:00: \t";
//while (!ArrayListsForClasses.time4.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time4.size(); i++) {
tues += ArrayListsForClasses.time4.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time4.get(i).displayCourse());
tues += ", ";
}
//}
tues += "\n 10:15 - 12:15:\t Group Exam 4 \n 12:45 - 2:45:\t ";
//while (!ArrayListsForClasses.time5.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time5.size(); i++) {
tues += ArrayListsForClasses.time5.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time5.get(i).displayCourse());
tues += ", ";
}
//}
tues += "\n 3:00 - 5:00:\t ";
//while (!ArrayListsForClasses.time6.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time6.size(); i++) {
tues += ArrayListsForClasses.time6.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time6.get(i).displayCourse());
tues += ", ";
}
//}
tues += "\n 5:30 - 7:30:\t ";
//while (!ArrayListsForClasses.time7.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time7.size(); i++) {
tues += ArrayListsForClasses.time7.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time7.get(i).displayCourse());
tues += ", ";
}
//}
tues += "\n 7:45 - 9:45:\t ";
//while (!ArrayListsForClasses.time8.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time8.size(); i++) {
tues += ArrayListsForClasses.time8.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time8.get(i).displayCourse());
tues += ", ";
}
//}
tues += "\n \n";
textAreaTue.setText(tues);
// TextAreaWed
wed = "Wednesday \n \n 8:00 - 10:00:\t";
//while (!ArrayListsForClasses.time9.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time9.size(); i++) {
wed += ArrayListsForClasses.time9.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time9.get(i).displayCourse());
wed += ", ";
}
//}
wed += "\n 10:15-12:15:\t";
//while (!ArrayListsForClasses.time10.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time10.size(); i++) {
wed += ArrayListsForClasses.time10.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time10.get(i).displayCourse());
wed += ", ";
}
//}
wed += "\n 12:45 - 2:45 :\t Group Exam 5 \n 3:00 - 5:00:\t";
//while (!ArrayListsForClasses.time11.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time11.size(); i++) {
wed += ArrayListsForClasses.time11.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time11.get(i).displayCourse());
wed += ", ";
}
//}
wed += "\n 5:30 - 7:30:\t";
//while (!ArrayListsForClasses.time12.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time12.size(); i++) {
wed += ArrayListsForClasses.time12.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time12.get(i).displayCourse());
wed += ", ";
}
//}
wed += "\n 7:45 - 9:45:\t";
//while (!ArrayListsForClasses.time13.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time13.size(); i++) {
wed += ArrayListsForClasses.time13.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time13.get(i).displayCourse());
wed += ", ";
}
//}
wed += "\n \n";
textAreaWed.setText(wed);
// TextAreaThurs
thu = "Thursday \n \n 8:00 - 10:00:\t";
//while (!ArrayListsForClasses.time14.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time14.size(); i++) {
thu += ArrayListsForClasses.time14.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time14.get(i).displayCourse());
thu += ", ";
}
//}
thu += "\n 10:15-12:15 :\t Group Exam 6 \n 12:45 - 2:45:\t";
//while (!ArrayListsForClasses.time15.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time15.size()-1; i++) {
thu += ArrayListsForClasses.time15.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time15.get(i).displayCourse());
thu += ", ";
}
//}
thu += "\n 3:00 - 5:00:\t";
//while (!ArrayListsForClasses.time16.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time16.size(); i++) {
thu += ArrayListsForClasses.time16.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time16.get(i).displayCourse());
thu += ", ";
}
//}
thu += "\n 5:30 - 7:30:\t Group Exam 7 \n 7:45 - 9:45:\t";
//while (!ArrayListsForClasses.time17.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time17.size(); i++) {
thu += ArrayListsForClasses.time17.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time17.get(i).displayCourse());
thu += ", ";
}
//}
thu += "\n \n";
textAreaThu.setText(thu);
// TextAreaFri
fri = "Friday \n \n 8:00 - 10:00:\t Group Exam 8 \n 10:15-12:15:\t";
//while (!ArrayListsForClasses.time18.isEmpty()) {
for (int i = 0; i < ArrayListsForClasses.time18.size(); i++) {
fri += ArrayListsForClasses.time18.get(i).displayCourse();
System.out.println("Added to string for GUI: " + ArrayListsForClasses.time18.get(i).displayCourse());
fri += ", ";
}
//}
fri += "\n 12:45 - 2:45:\t Group Exam 9";
fri += "\n \n";
textAreaFri.setText(fri);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
makeGUI();
}
});
}
}
答案 0 :(得分：3)
务必将面板传递给JScrollPane构造函数：
public static void makeGUI() {
final JFrame frame = new JFrame("Final Exam Scheduler");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
final Test add = new Test();
add.addComponents(panel);
final JScrollPane pane = new JScrollPane(panel, // <-- here
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
frame.getContentPane().add(pane);
add.printToGUI();
frame.pack();
frame.setVisible(true);
}