preferredsize

I want the table with the same width as the frame and also when I resize the frame the table need to be resized too. I think setSize() of JTable doesn't work correctly. Can you help me? 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)

As you can see, it's ugly to have these kind of JMenuItem s. The width of the menu items is quite small. Here is the code: JMenu menuOne=new JMenu("MenuOne"); JMenu menuTwo=new JMenu("MenuTwo"); JMenu menuThree=new JMenu("MenuThree"); JMenu menuFour=new JMenu("MenuFour"); JMenuBar mbar=new JMenuBar(); //add the menu to menubar mbar.add(menuOne); JMenuItem OneItOne=new JMenuItem("1"); JMenuItem OneItTwo=new JMenuItem("2"); menuOne.add(OneItOne); menuOne.addSeparator(); menuOne.add(OneItTwo); mbar.add(menuTwo); mbar.add(menuThree); mbar.add(menuFour); setJMenuBar(mbar); Simply adding some blanks

I am trying to match the JTable column width depending on the data inside. My Code: for(int column = 0; column < gui.testsuiteInfoTable.getColumnCount(); column ++){ int width =0; for (int row = 0; row < gui.testsuiteInfoTable.getRowCount(); row++) { TableCellRenderer renderer = gui.testsuiteInfoTable.getCellRenderer(row, column); Component comp = gui.testsuiteInfoTable.prepareRenderer(renderer, row, column); width = Math.max (comp.getPreferredSize().width, width); System.out.println(width); } TableColumn col = new TableColumn(); col = gui.testsuiteInfoTable.getColumnModel().getColumn(column);

I have a JPanel in my java code and I want to set its size, I have used JPanel.setSize(500,500); and JPanel.setSize(new Dimension(500,500)); but both are not working. Please tell how I can set the size of JPanel? Most Swing layout managers respect a component's preferredSize and not its size. You could call setPreferredSize(new Dimension(500, 500)) , but this can be overridden later in your code, and can lead to an inflexible GUI. Better to override the JPanel's getPreferredSize() method and return a calculated Dimension that works best in all situations. For example: import java.awt.Color;

I understand from this post Don't Set sizes on a JComponent that you dont set preferred sizes on any component and instead let the layout manager do this for you. My question is, I have a JPanel that I put into a JTabbedPane into a JFrame like this JFrame frame=new JFrame(); JTabbedPane pane=new JTabbedPane(); pane.addTab("Tab 1",new JScrollPane(getJPanel1())); pane.addTab("Tab 2",new JScrollPane(getJPanel2())); frame.setContentPane(pane); Now in this case the JTabbedPane will take the size of the maximum sized component you add to it. Because of this my JScrollPane does not show up at all. I