java - JTable 未出现 - 包含 addRow

Question

代码运行没有错误，但 JTable 没有出现。

import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import java.awt.Dimension;

public class CreateTable {

    public static void main(String[] args) { 
        //init table
        DefaultTableModel model = new DefaultTableModel();
        JTable table = new JTable(model);
        model.addColumn("col1");
        model.addColumn("col2");
        model.addColumn("col3");
        model.addColumn("col4");  

        for (int i=1;i<=100;i++){
           model.addRow(new Object[]{i,1,2,3});  //output jtable row
        }

        table.setPreferredScrollableViewportSize(new Dimension(500,50));
        table.setFillsViewportHeight(true);
        table.setSize(600, 200);
        table.setVisible(true);  
    }
}

Answer 1

您可以查看教程或示例(http://docs.oracle.com/javase/tutorial/uiswing/examples/components/)

public static void main(String[] args) {
    //init frame - main component
    JFrame frame = new JFrame("SimpleTableDemo");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Create and set up the content pane.
    JPanel panel = new JPanel();
    frame.setContentPane(panel);

    DefaultTableModel model = new DefaultTableModel();
    JTable table = new JTable(model);
    model.addColumn("col1");
    model.addColumn("col2");
    model.addColumn("col3");
    model.addColumn("col4");

    for (int i=1;i<=100;i++){
        model.addRow(new Object[]{i,1,2,3});  //output jtable row
    }
    table.setSize(600, 200);
    JScrollPane scrollPane = new JScrollPane(table);
    panel.add(scrollPane);
    //Display the window.
    frame.pack();
    frame.setVisible(true);
}