Swing - 文本输入和输出到textarea
我想用Swing制作简单的GUI，它有2个输入文本字段和一个按钮。
根据输入，该程序将从表中提取name / rol-no / age / emailid，并需要在同一屏幕中显示下面的文本区域。文本区域应该是可滚动的。我希望输入/输出在同一个屏幕上。有人可以告诉哪种布局是理想的吗？
---------------------------------------------------------------------------
School(label1):textfield1____
class(label2):textfield2____
SUbmit(Button1)
name(label2) roll-no(label3) age(label4) email-id(label5)
row-1 -----
row-2 ----
row-3 ----
row-4 ----
.
.
row-nth ---
----------------------------------------------------------------------------
您好
尝试下面的代码..但表positreinc incorreclty.Please帮助。
公共课堂考试{
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
final JFrame f = new JFrame();
f.setSize(1000, 1000);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setResizable(true);
final JPanel pnl = new JPanel(new GridBagLayout());
final GridBagConstraints c = new GridBagConstraints();
JLabel lbl = new JLabel("School ");
c.gridx = 0;
c.gridy = 0;
pnl.add(lbl, c);
final JTextField tf = new JTextField(20);
c.gridx = 1;
c.gridy = 0;
tf.setText("");
pnl.add(tf, c);
JLabel lb2 = new JLabel("Class");
c.gridx = 0;
c.gridy = 1;
pnl.add(lb2, c);
final JTextField tf2 = new JTextField(20);
c.gridx = 1;
c.gridy = 1;
tf2.setText("");
pnl.add(tf2, c);
final String[] columnNames = { "name", "roll-no", "age", "email-id" };
Object[][] columnData = new String[2][4];
columnData[0][0] = "X";
columnData[0][1] = "1";
columnData[0][2] = "22";
columnData[0][3] = "X@XMAIL.COM";
columnData[1][0] = "Y";
columnData[1][1] = "2";
columnData[1][2] = "24";
columnData[1][3] = "Y@XMAIL.COM";
JTable table = new JTable(columnData, columnNames);
table.setBounds(300, 600, 700, 150);
JScrollPane scrollpane = new JScrollPane(table);
pnl.add(scrollpane);
f.getContentPane().add(BorderLayout.NORTH, pnl);
f.setVisible(true);
}
}
3 个答案:
答案 0 :(得分：1)
我会先使用JPanel使用BorderLayout，暂时将其称为content ...
然后我会使用JPanel创建一个GridBagLayout并将字段添加到其中，暂时调用此form ...
我会将form添加到content位置的BorderLayout.NORTH。
然后我会在JTable中将JScrollPane添加到BorderLayout.CENTER的{{1}}位置
首先看看......
- Creating a GUI with Swing
- How to use BorderLayout
- How to use GridBagLayout
- How to use tables
- How to use Scroll Panes
了解更多详情......
根据更新后的问题更新了示例
你的意思更像......
content不是将所有字段和表格添加到同一个面板，而是使用“主”面板，该面板使用import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class TestLayout30 {
public static void main(String[] args) {
new TestLayout30();
}
public TestLayout30() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new MainPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class MainPane extends JPanel {
public MainPane() {
setLayout(new BorderLayout());
JPanel pnl = new JPanel(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
JLabel lbl = new JLabel("School ");
c.gridx = 0;
c.gridy = 0;
c.anchor = GridBagConstraints.WEST;
pnl.add(lbl, c);
final JTextField tf = new JTextField(20);
c.gridx = 1;
c.gridy = 0;
c.weightx = 1;
tf.setText("");
pnl.add(tf, c);
JLabel lb2 = new JLabel("Class");
c.gridx = 0;
c.gridy = 1;
c.weightx = 0;
pnl.add(lb2, c);
final JTextField tf2 = new JTextField(20);
c.gridx = 1;
c.gridy = 1;
c.weightx = 1;
tf2.setText("");
pnl.add(tf2, c);
add(pnl, BorderLayout.NORTH);
final String[] columnNames = {"name", "roll-no", "age", "email-id"};
Object[][] columnData = new String[2][3];
columnData[0][0] = "X";
columnData[0][4] = "1";
columnData[0][5] = "22";
columnData[0][6] = "X@XMAIL.COM";
columnData[1][0] = "Y";
columnData[1][7] = "2";
columnData[1][8] = "24";
columnData[1][9] = "Y@XMAIL.COM";
JTable table = new JTable(columnData, columnNames);
table.setBounds(300, 600, 700, 150);
JScrollPane scrollpane = new JScrollPane(table);
add(scrollpane);
}
}
}
并将字段（在单独的面板上）添加到BorderLayout位置，表格到NORTH位置。这通常称为复合布局。它允许您设计复杂的布局，其中包括尝试将所有内容融入单个组件的所有复杂性......
您还可以使用CENTER GridBagConstraints，weightx = 1，weighty = 1，fill = GridBagConstraints.BOTH添加表格，但这只会变得混乱...
已更新为可选但不可编辑的示例
默认情况下，gridwidth = GridBagConstraints.REMAINDER是可编辑的。更改它的唯一方法是覆盖DefaultTableModel方法并将其设为isCellEditable return
false另外，避免使用import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.DefaultComboBoxModel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;
public class TestLayout30 {
public static void main(String[] args) {
new TestLayout30();
}
public TestLayout30() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new MainPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class MainPane extends JPanel {
public MainPane() {
setLayout(new BorderLayout());
JPanel pnl = new JPanel(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
JLabel lbl = new JLabel("School ");
c.gridx = 0;
c.gridy = 0;
c.anchor = GridBagConstraints.WEST;
pnl.add(lbl, c);
final JTextField tf = new JTextField(20);
c.gridx = 1;
c.gridy = 0;
c.weightx = 1;
tf.setText("");
pnl.add(tf, c);
JLabel lb2 = new JLabel("Class");
c.gridx = 0;
c.gridy = 1;
c.weightx = 0;
pnl.add(lb2, c);
final JTextField tf2 = new JTextField(20);
c.gridx = 1;
c.gridy = 1;
c.weightx = 1;
tf2.setText("");
pnl.add(tf2, c);
add(pnl, BorderLayout.NORTH);
final String[] columnNames = {"name", "roll-no", "age", "email-id"};
DefaultTableModel model = new DefaultTableModel(columnNames, 0) {
@Override
public boolean isCellEditable(int row, int column) {
return false;
}
};
Object[][] rowData = new String[2][11];
rowData[0][0] = "X";
rowData[0][12] = "1";
rowData[0][13] = "22";
rowData[0][14] = "X@XMAIL.COM";
rowData[1][0] = "Y";
rowData[1][15] = "2";
rowData[1][16] = "24";
rowData[1][17] = "Y@XMAIL.COM";
for (Object[] row : rowData) {
model.addRow(row);
}
JTable table = new JTable(model);
JScrollPane scrollpane = new JScrollPane(table);
add(scrollpane);
}
}
}
，它只会产生更多问题然后解决......
答案 1 :(得分：0)
您可以使用TableLayout或GridBagLayout。以下是两者的链接。
1. GridBagLayout
2. TableLayout
答案 2 :(得分：0)
我厌倦了Java复杂的布局管理器，这些管理器没有多大意义并转移到：
易于安装，10~20分钟即可掌握所有基础知识，它是天堂，让我的设计变得更加轻松。 我推荐它比其他布局管理器。
- 我写了这段代码，但我无法理解我的错误
- 我无法从一个代码实例的列表中删除 None 值，但我可以在另一个实例中。为什么它适用于一个细分市场而不适用于另一个细分市场？
- 是否有可能使 loadstring 不可能等于打印？卢阿
- java中的random.expovariate()
- Appscript 通过会议在 Google 日历中发送电子邮件和创建活动
- 为什么我的 Onclick 箭头功能在 React 中不起作用？
- 在此代码中是否有使用“this”的替代方法？
- 在 SQL Server 和 PostgreSQL 上查询，我如何从第一个表获得第二个表的可视化
- 每千个数字得到
- 更新了城市边界 KML 文件的来源？