java 示例代码_一个简单的Java表程序（带有示例代码）

叁歲伎倆 2022-12-07 12:12 225阅读 0赞

java 示例代码

## Java代码 **(** Java Code **)** ##

![Picture of a businessman working on laptop][]

The following code shows how to use the JTable class to create a simple table as part of a [GUI][]. The AbstractTableModel class is used as a data manager for the JTable.

以下代码显示了如何使用JTable类创建作为[GUI][]一部分的简单表。 AbstractTableModel类用作JTable的数据管理器。

//Imports are listed in full to show what's being used
    //could just import javax.swing.* and java.awt.* etc..
    import java.awt.Color;
    import java.awt.EventQueue;
    import javax.swing.JFrame;
    import javax.swing.JTable;
    import javax.swing.JScrollPane;
    import javax.swing.JComboBox;
    import javax.swing.table.AbstractTableModel;
    import javax.swing.table.TableColumn;
    import javax.swing.DefaultCellEditor;
    public class TableExample {
    //Note: Typically the main method will be in a
    //separate class. As this is a simple one class
    //example it's all in the one class.
    public static void main(String[] args) {
    //Use the event dispatch thread for Swing components
    EventQueue.invokeLater(new Runnable()
    {
    @Override
    public void run()
    {
    new TableExample();
    }
    });
    }
    public TableExample()
    {
    JFrame guiFrame = new JFrame();
    //make sure the program exits when the frame closes
    guiFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    guiFrame.setTitle("Creating a Table Example");
    guiFrame.setSize(700,200);
    //This will center the JFrame in the middle of the screen
    guiFrame.setLocationRelativeTo(null);
    //Create the JTable using the ExampleTableModel implementing
    //the AbstractTableModel abstract class
    JTable table = new JTable(new ExampleTableModel());
    //Set the column sorting functionality on
    table.setAutoCreateRowSorter(true);
    //Uncomment the next line if you want to turn the grid lines off
    // table.setShowGrid(false);
    //Change the colour of the table - yellow for gridlines
    //blue for background
    table.setGridColor(Color.YELLOW);
    table.setBackground(Color.CYAN);
    //String array to populate the combobox options
    String[] countries = {"Australia", "Brazil", "Canada", "China"
    ,"France", "Japan", "Norway", "Russia", "South Korea"
    , "Tunisia", "USA"};
    JComboBox countryCombo = new JComboBox(countries);
    //Set the default editor for the Country column to be the combobox
    TableColumn countryColumn = table.getColumnModel().getColumn(2);
    countryColumn.setCellEditor(new DefaultCellEditor(countryCombo));
    //set the Event column to be larger than the rest and the Place column
    //to be smaller
    TableColumn eventColumn = table.getColumnModel().getColumn(3);
    eventColumn.setPreferredWidth(150);
    TableColumn placeColumn = table.getColumnModel().getColumn(4);
    placeColumn.setPreferredWidth(5);
    //Place the JTable object in a JScrollPane for a scrolling table
    JScrollPane tableScrollPane = new JScrollPane(table);
    guiFrame.add(tableScrollPane);
    guiFrame.setVisible(true);
    }
    //implement a table model by extending a class to use
    //the AbstractTableModel
    class ExampleTableModel extends AbstractTableModel{
    //Two arrays used for the table data
    String[] columnNames = {"First Name", "Surname", "Country"
    , "Event", "Place", "Time", "World Record" };
    Object[][] data = {
    {"César Cielo", "Filho", "Brazil", "50m freestyle",1 , "21.30", false },
    {"Amaury", "Leveaux", "France", "50m freestyle", 2, "21.45", false },
    {"Alain", "Bernard", "France", "50m freestyle", 3, "21.49", false },
    {"Alain", "Bernard", "France", "100m freestyle", 1, "47.21", false },
    {"Eamon", "Sullivan", "Australia", "100m freestyle", 2, "47.32", false },
    {"Jason", "Lezak", "USA", "100m freestyle", 3, "47.67", false },
    {"César Cielo", "Filho", "Brazil", "100m freestyle", 3, "47.67", false },
    {"Michael", "Phelps", "USA", "200m freestyle", 1, "1:42.96", true },
    {"Park", "Tae-Hwan", "South Korea", "200m freestyle", 2, "1:44.85", false },
    {"Peter", "Vanderkaay", "USA", "200m freestyle", 3, "1:45.14", false },
    {"Park", "Tae-Hwan", "South Korea", "400m freestyle", 1, "3:41.86", false },
    {"Zhang", "Lin", "China", "400m freestyle", 2, "3:42.44", false },
    {"Larsen", "Jensen", "USA", "400m freestyle", 3, "3:42.78", false },
    {"Oussama", "Mellouli", "Tunisia", "1500m freestyle",1 , "14:40.84", false },
    {"Grant", "Hackett", "Australia", "1500m freestyle", 2, "14:41.53", false },
    {"Ryan", "Cochrane", "Canada", "1500m freestyle", 3, "14:42.69", false },
    {"Aaron", "Peirsol", "USA", "100m backstroke", 1, "52.54", true },
    {"Matt", "Grevers", "USA", "100m backstroke", 2, "53.11", false },
    {"Arkady", "Vyatchanin", "Russia", "100m backstroke", 3, "53.18", false },
    {"Hayden", "Stoeckel", "Australia", "100m freestyle", 3, "53.18", false },
    {"Ryan", "Lochte", "USA", "200m backstroke", 1, "1:53.94", true },
    {"Aaron", "Peirsol", "USA", "200m backstroke", 2, "1:54.33", false },
    {"Arkady", "Vyatchanin", "Russia", "200m backstroke", 3, "1:54.93", false },
    {"Kosuke", "Kitajima", "Japan", "100m breaststroke", 1, "58.91", true },
    {"Alexander", "Dale Oen", "Norway", "100m breaststroke", 2, "59.20", false },
    {"Hugues", "Duboscq", "France", "100m breaststroke", 3, "59.37", false }
    };
    @Override
    public int getRowCount()
    {
    return data.length;
    }
    @Override
    public int getColumnCount()
    {
    return columnNames.length;
    }
    @Override
    public Object getValueAt(int row, int column)
    {
    return data[row][column];
    }
    //Used by the JTable object to set the column names
    @Override
    public String getColumnName(int column) {
    return columnNames[column];
    }
    //Used by the JTable object to render different
    //functionality based on the data type
    @Override
    public Class getColumnClass(int c) {
    return getValueAt(0, c).getClass();
    }
    @Override
    public boolean isCellEditable(int row, int column)
    {
    if (column == 0 || column == 1)
    {
    return false;
    }
    else
    {
    return true;
    }
    }
    }
    }

## 注意 **(** Note **)** ##

See [How to Create a Simple Table][] for a step-by-step guide that goes with this example code.

有关此示例代码的分步指南，请参见[如何创建简单表][How to Create a Simple Table] 。

> 翻译自: [https://www.thoughtco.com/a-simple-table-example-java-code-program-2033892][https_www.thoughtco.com_a-simple-table-example-java-code-program-2033892]

java 示例代码

[Picture of a businessman working on laptop]: /images/20221123/b899c36a70e841fa8399c0f93adb6edf.png
[GUI]: https://www.thoughtco.com/gui-2034108
[How to Create a Simple Table]: https://www.thoughtco.com/how-to-create-a-simple-table-2033894
[https_www.thoughtco.com_a-simple-table-example-java-code-program-2033892]: https://www.thoughtco.com/a-simple-table-example-java-code-program-2033892