7

我想要与框架具有相同宽度的表格，并且当我调整框架大小时，表格也需要调整大小。我认为不能正常工作setSize()。JTable你能帮助我吗？

import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;

public class Main extends JFrame {

    public Main() {
        setSize(400, 600);
        String[] columnNames = {"A", "B", "C"};
        Object[][] data = {
            {"Moni", "adsad", 2},
            {"Jhon", "ewrewr", 4},
            {"Max", "zxczxc", 6}
        };

        JTable table = new JTable(data, columnNames);
        JScrollPane tableSP = new JScrollPane(table);

        int A = this.getWidth();
        int B = this.getHeight();

        table.setSize(A, B);
        JPanel tablePanel = new JPanel();
        tablePanel.add(tableSP);
        tablePanel.setBackground(Color.red);

        add(tablePanel);
        setTitle("Marks");

        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            public void run() {
                Main ex = new Main();
                ex.setVisible(true);
            }
        });
    }
}
4

4 回答 4

19

看看

table.setPreferredScrollableViewportSize(table.getPreferredSize());
table.setFillsViewportHeight(true);

对于您在此处发布的代码

于 2012-11-03T22:52:41.417 回答
8

摆脱所有的setSize电话。然后摆脱tablePanel并tableSP直接在 的内容窗格中JFrame。

a 的内容窗格JFrame默认具有 a BorderLayout，并且将组件添加到BorderLayout#CENTER（当您在没有约束的情况下简单地使用时这是默认设置add）将确保该组件采用父容器的大小。

快速调整您的代码

public class Main extends JFrame {

    public Main() {
        String[] columnNames = {"A", "B", "C"};
        Object[][] data = {
            {"Moni", "adsad", 2},
            {"Jhon", "ewrewr", 4},
            {"Max", "zxczxc", 6}
        };

        JTable table = new JTable(data, columnNames);
        JScrollPane tableSP = new JScrollPane(table);
        tableSP.setPreferredSize( 400, 600 );

        add(tableSP);
        setTitle("Marks");

        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        pack();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            public void run() {
                Main ex = new Main();
                ex.setVisible(true);
            }
        });
    }
}

小旁注：没有理由扩展JFrame. 只用一个

于 2012-11-03T21:30:16.047 回答
1

作为替代方案，GridLayout用于您的tablePanel和pack()封闭的Window.

import java.awt.Color;
import java.awt.GridLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;

public class Main extends JFrame {

    public Main() {
        String[] columnNames = {"A", "B", "C"};
        Object[][] data = {
            {"Moni", "adsad", 2},
            {"Jhon", "ewrewr", 4},
            {"Max", "zxczxc", 6}
        };

        JTable table = new JTable(data, columnNames);
        JScrollPane tableSP = new JScrollPane(table);

        int A = this.getWidth();
        int B = this.getHeight();

        table.setSize(A, B);
        JPanel tablePanel = new JPanel(new GridLayout());
        tablePanel.add(tableSP);
        tablePanel.setBackground(Color.red);

        add(tablePanel);
        setTitle("Marks");

        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        pack();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            public void run() {
                Main ex = new Main();
                ex.setVisible(true);
            }
        });
    }
}
于 2012-11-03T21:32:48.280 回答
1

这是一个答案：

import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;

public class Main extends JFrame {
    JTable table = new JTable();
    DefaultTableModel model = new DefaultTableModel(new Object[][]{},new String[]{"A","B","C"});
    public Main() {
        super("Mark");
        table.setModel(model);
        add(new JScrollPane(table));

   }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            public void run() {
                Main ex = new Main();
                ex.setDefaultCloseOperation(EXIT_ON_CLOSE);
                ex.setLocationByPlatform(true);
                ex.pack();
                ex.setVisible(true);
            }
        });
    }
}

相当简化，但相同。:)

于 2012-11-03T21:36:43.860 回答