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在我的程序中，我的元素被組織成堆疊在一起，唯一的問題是它們水平伸展以觸及JFrame的所有邊緣，而我不想這樣，不能爲我的生活找出如何阻止這種情況的發生。沒有所有的元素接觸JFrame的邊框
下面是我的代碼，非常感謝。
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
@SuppressWarnings({ "serial", "unused" })
public class MedGUITest extends JFrame {
private JLabel medName;
private JLabel medTime;
private JLabel medDose;
private JLabel finished;
private JTextField textFieldMed;
private JTextField textFieldTime;
private JTextField textFieldDose;
private JButton submitButton;
private JButton meds;
static int winWidth = 300;
static int winLength = 300;
JTextArea ta = new JTextArea(winWidth,winLength);
JPanel panel = new JPanel();
public MedGUITest() throws FileNotFoundException, IOException{
panel.setLayout(new BoxLayout(panel,BoxLayout.Y_AXIS));
add(panel);
setLayout(new FlowLayout());
medName = new JLabel("Type Medication Here:");
panel.add(medName);
textFieldMed = new JTextField("",15);
panel.add(textFieldMed);
medDose = new JLabel("Type Medication Dose:");
panel.add(medDose);
textFieldDose = new JTextField("",15);
panel.add(textFieldDose);
medTime = new JLabel("Type Medication Time:");
panel.add(medTime);
textFieldTime = new JTextField("",15);
panel.add(textFieldTime);
submitButton = new JButton("Click Here to Add");
submitButton.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e){
String medName = textFieldMed.getText();
String medDose = textFieldDose.getText();
String medTime = textFieldTime.getText();
File med = new File("med.txt");
try(PrintWriter out= new PrintWriter(new FileWriter(med,true))) {
out.println("Medication: " + medName + " " +"Dosage: "+ medDose + " Mg"+ " " +"Time of day: "+ medTime);
String lastMed = ("Medication: " + medName + " " +"Dosage: "+ medDose + " Mg"+ " " +"Time of day: "+ medTime+ "\n");
finished.setText("Your Med has been added");
Timer t = new Timer(5000, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
finished.setText(null);
}
});
t.setRepeats(false);
t.start();
ta.append(lastMed);
} catch (IOException e1) {
e1.printStackTrace();
}
}
});
panel.add(submitButton);
final File med = new File("med.txt");
if(med.exists()){
}else{
meds = new JButton("Click Here to see meds");
meds.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
if(med.exists()){
try {
ta.read(new FileReader("med.txt"),null);
} catch (IOException e1) {
e1.printStackTrace();
}
panel.add(ta);}
}
});
panel.add(meds);
}
finished = new JLabel("");
panel.add(finished);
if(med.exists()){
ta.read(new FileReader("med.txt"),null);
panel.add(ta);}
}
public static void main(String args[]) throws FileNotFoundException, IOException{
MedGUITest gui = new MedGUITest();
gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
gui.pack();
gui.setVisible(true);
gui.setTitle("Standard GUI");
}
}