这似乎是一个愚蠢的问题，但我想在我的 jFrame 中更改“框”的大小。我将包括代码和图片。
这是 JTableResultSet 类：
import java.sql.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.TableColumn;
public class JTableResultSet {
public static void main(String[] args) {
Vector columnNames = new Vector();
Vector data = new Vector();
JPanel panel = new JPanel(); //
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con = DriverManager.getConnection("jdbc:mysql://localhost/exper482_social", "admin", "testing");
String sql = "Select username, forename, lastname, password from social_users";
Statement statement = con.createStatement();
ResultSet resultSet = statement.executeQuery(sql);
ResultSetMetaData metaData = resultSet.getMetaData();
int columns = metaData.getColumnCount();
for (int i = 1; i <= columns; i++) {
columnNames.addElement(metaData.getColumnName(i));
}
while (resultSet.next()) {
Vector row = new Vector(columns);
for (int i = 1; i <= columns; i++) {
row.addElement(resultSet.getObject(i));
}
data.addElement(row);
}
resultSet.close();
statement.close();
} catch (Exception e) {
System.out.println(e);
}
JTable table = new JTable(data, columnNames);
TableColumn column;
for (int i = 0; i < table.getColumnCount(); i++) {
column = table.getColumnModel().getColumn(i);
column.setMaxWidth(250);//250
}
JScrollPane scrollPane = new JScrollPane(table);
panel.add(scrollPane);
JFrame frame = new JFrame();
frame.add(panel);//adding panel to the frame
frame.setSize(600, 400); //setting frame size 600 400
frame.setVisible(true); //setting visibility true
}
}
这是照片：
http://i.stack.imgur.com/Wblfx.png
有人能告诉我我能做些什么来让盒子变大吗？谢谢。