在JScrollPane和JPanel中设置JTable的大小，使用JFrame的大小

我希望表格的宽度与帧的宽度相同，当我调整帧的大小时，表格也需要resize。 我认为JTable setSize()无法正常工作。 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); } }); } } 

Answer 1

看看

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

对于您在此处发布的代码

Answer 2

摆脱所有setSize调用。 然后摆脱tablePanel ，直接在tableSP直接到JFrame的内容窗格。

默认情况下， JFrame的内容窗格具有BorderLayout ，并且向BorderLayout#CENTER添加组件（当您只使用不带约束的add时，这是默认设置）将确保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); } }); } } 

小方注：没有理由扩展JFrame 。 只需使用一个

Answer 3

作为替代方案，使用GridLayout为tablePanel和pack()封闭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); } }); } } 

Answer 4

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); } }); } } 

相当简单，但相同。 🙂