有人可以告诉我我需要添加什么内容以及每个区域是否有滚动条？
我正在尝试为我的文本区域添加一个滚动条，但我再次失败了！
我创建了GroupLayout，你可以看到......
import java.awt.*;
import java.awt.event.*;
import java.util.Date;
import javax.swing.*;
import java.net.*;
import java.io.IOException;
public class GUIriks extends JFrame implements ActionListener{
JButton poga1 = new JButton("Poga 1"); //Definejam gui komponentes
JTextArea area1 = new JTextArea(30,20); //Definejam gui komponentes
JButton poga2 = new JButton("Poga 2"); //Definejam gui komponentes
JTextArea area2 = new JTextArea(30,20); //Definejam gui komponentes
JButton poga3 = new JButton("Poga 3"); //Definejam gui komponentes
JTextArea area3 = new JTextArea(30,20); //Definejam gui komponentes
JButton poga4 = new JButton("Poga 4"); //Definejam gui komponentes
JTextArea area4 = new JTextArea(30,20); //Definejam gui komponentes
public GUIriks(){
super("GUI Rīks");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container content = getContentPane();
content.setBackground(Color.gray);
GroupLayout layout = new GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setAutoCreateGaps(true);
layout.setAutoCreateContainerGaps(true);
content.add(poga1);
content.add(area1);
content.add(poga2);
content.add(area2);
content.add(poga3);
content.add(area3);
content.add(poga4);
content.add(area4);
JScrollPane scrollPane1 = new JScrollPane(area1);
JScrollPane scrollPane2 = new JScrollPane(area2);
JScrollPane scrollPane3 = new JScrollPane(area3);
JScrollPane scrollPane4 = new JScrollPane(area4);
content.add(scrollPane1, BorderLayout.WEST);
content.add(scrollPane2, BorderLayout.NORTH);
content.add(scrollPane3, BorderLayout.EAST);
content.add(scrollPane4, BorderLayout.EAST);
poga1.addActionListener(this);
poga2.addActionListener(this);
poga3.addActionListener(this);
poga4.addActionListener(this);
poga1.setBackground(new Color(175,238,238));
poga2.setBackground(new Color(255,182,193));
poga3.setBackground(new Color(211,211,211));
poga4.setBackground(new Color(152,251,152));
layout.setHorizontalGroup( layout.createSequentialGroup()
.addGroup( layout.createParallelGroup( GroupLayout.Alignment.LEADING )
.addComponent( poga1 )
.addComponent( poga2 )
.addComponent( poga3 )
.addComponent( poga4 ))
.addGroup( layout.createParallelGroup( GroupLayout.Alignment.LEADING )
.addComponent( area1 )
.addComponent( area2 )
.addComponent( area3 )
.addComponent( area4 ))
);
// Vertically, we want to align each label with his textfield
// on the baseline of the components
layout.setVerticalGroup( layout.createSequentialGroup()
.addGroup( layout.createParallelGroup( GroupLayout.Alignment.BASELINE )
.addComponent( poga1 )
.addComponent( area1 ) )
.addGroup( layout.createParallelGroup( GroupLayout.Alignment.BASELINE )
.addComponent( poga2 )
.addComponent( area2 ) )
.addGroup( layout.createParallelGroup( GroupLayout.Alignment.BASELINE )
.addComponent( poga3 )
.addComponent( area3 ) )
.addGroup( layout.createParallelGroup( GroupLayout.Alignment.BASELINE )
.addComponent( poga4 )
.addComponent( area4 ) )
);
setSize(1000,400);
setVisible(true);
}
public void actionPerformed(ActionEvent a) {
if (a.getSource() == poga1){
this.metode1();}
else if (a.getSource() == poga2){
this.metode2();}
else if (a.getSource() == poga3){
this.metode3();}
else if (a.getSource() == poga4){
this.metode4();}
}
public void metode1()
{
try {
InetAddress[] adreses = InetAddress.getAllByName("www.delfi.lv");
for (int i = 0; i < adreses.length; i++) {
area1.append("Adresse ir:" + adreses[i] + "\n");
}
}
catch (UnknownHostException ex) {
area1.append("Nevaru atrastfind www.delfi.lv");
}
}
public void metode2()
{
boolean rootaccess = false;
for (int port = 1; port < 1024; port += 100) {
try {
ServerSocket ss = new ServerSocket(port);
// ja tas izdodas... tad...
rootaccess = true;
ss.close();
break;
}
catch (IOException ex) {
}
}
int startport = 1;
if (!rootaccess) startport = 1024;
int stopport = 65535;
for (int port = startport; port <= stopport; port++) {
try {
ServerSocket socket1 = new ServerSocket(port);
socket1.close();
}
catch (IOException ex) {
area2.append("Ports " + port + " ir aiznemts \n");
}
}
area2.append("Skenesana ir pabeigta!");
}
public void metode3()
{
Date sysDate = new Date();
String dateString = sysDate.toString();
area3.setText("Sodien ir " + dateString);
area3.append("\n\n\n");
area3.append("Seit var pievienot izvadu no citam metodem \n");
}
public void metode4()
{
try {
InetAddress es = InetAddress.getLocalHost();
area4.append("Mani sauc " + es.getHostName() + "\n");
area4.append("Mana adrese ir " + es.getHostAddress() + "\n");
byte[] adrese = es.getAddress();
for (int i = 0; i < adrese.length; i++) {
area4.append(adrese[i] + " ");
}
}
catch (UnknownHostException e) {
area4.append("Nevaru noteikt lokalo adresi.");
area4.append("Baidos ka tīks nestrādā...");
}
}
public static void main(String[] args){
new GUIriks();
}
}
答案 0 :(得分：2)
所以，很难确切地知道你正在做什么，但我的猜测是你正在接受由表单编辑器生成的代码，并试图修改它以适应你的新需求
但是您的基本问题是，您将JTextArea添加到content面板，将它们包装在JScrollPane中，但是然后通过布局将它们添加回content窗格......这只是一团糟。
相反，您的构造函数应该如下所示......
content.add(poga1);
//content.add(area1);
content.add(poga2);
//content.add(area2);
content.add(poga3);
//content.add(area3);
content.add(poga4);
//content.add(area4);
JScrollPane scrollPane1 = new JScrollPane(area1);
JScrollPane scrollPane2 = new JScrollPane(area2);
JScrollPane scrollPane3 = new JScrollPane(area3);
JScrollPane scrollPane4 = new JScrollPane(area4);
content.add(scrollPane1, BorderLayout.WEST);
content.add(scrollPane2, BorderLayout.NORTH);
content.add(scrollPane3, BorderLayout.EAST);
content.add(scrollPane4, BorderLayout.EAST);
poga1.addActionListener(this);
poga2.addActionListener(this);
poga3.addActionListener(this);
poga4.addActionListener(this);
poga1.setBackground(new Color(175, 238, 238));
poga2.setBackground(new Color(255, 182, 193));
poga3.setBackground(new Color(211, 211, 211));
poga4.setBackground(new Color(152, 251, 152));
layout.setHorizontalGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(poga1)
.addComponent(poga2)
.addComponent(poga3)
.addComponent(poga4))
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(scrollPane1)
.addComponent(scrollPane2)
.addComponent(scrollPane3)
.addComponent(scrollPane4))
);
// Vertically, we want to align each label with his textfield
// on the baseline of the components
layout.setVerticalGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(poga1)
.addComponent(scrollPane1))
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(poga2)
.addComponent(scrollPane2))
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(poga3)
.addComponent(scrollPane3))
.addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(poga4)
.addComponent(scrollPane4))
);