介绍

GridLayout 类组件排列在一个长方形的网格。

类的声明

以下是声明的java.awt.GridLayout类：

public class GridLayout
   extends Object
      implements LayoutManager, Serializable

类的构造函数

S.N.	构造函数与说明
1	GridLayout() Creates a grid layout with a default of one column per component, in a single row.
2	GridLayout(int rows, int cols)  Creates a grid layout with the specified number of rows and columns.
3	GridLayout(int rows, int cols, int hgap, int vgap)  Creates a grid layout with the specified number of rows and columns.

类方法

S.N.	方法和说明
1	void addLayoutComponent(String name, Component comp)  Adds the specified component with the specified name to the layout.
2	int getColumns()  Gets the number of columns in this layout.
3	int getHgap()  Gets the horizontal gap between components.
4	int getRows()  Gets the number of rows in this layout.
5	int getVgap()  Gets the vertical gap between components.
6	void layoutContainer(Container parent)  Lays out the specified container using this layout.
7	Dimension minimumLayoutSize(Container parent)  Determines the minimum size of the container argument using this grid layout.
8	Dimension preferredLayoutSize(Container parent)  Determines the preferred size of the container argument using this grid layout.
9	void removeLayoutComponent(Component comp)  Removes the specified component from the layout.
10	void setColumns(int cols)  Sets the number of columns in this layout to the specified value.
11	void setHgap(int hgap)  Sets the horizontal gap between components to the specified value.
12	void setRows(int rows)  Sets the number of rows in this layout to the specified value.
13	void setVgap(int vgap)  Sets the vertical gap between components to the specified value.
14	String toString()  Returns the string representation of this grid layout's values.

继承的方法

这个类继承的方法从以下类：

• java.lang.Object

GridLayout 实例

在选择使用任何编辑器创建以下java程序D:/ > AWT > com > yiibai > gui >

AwtLayoutDemo

package com.yiibai.gui;

import java.awt.*;
import java.awt.event.*;

public class AwtLayoutDemo {
   private Frame mainFrame;
   private Label headerLabel;
   private Label statusLabel;
   private Panel controlPanel;
   private Label msglabel;

   public AwtLayoutDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      AwtLayoutDemo  awtLayoutDemo = new AwtLayoutDemo();  
      awtLayoutDemo.showGridLayoutDemo();       
   }
      
   private void prepareGUI(){
      mainFrame = new Frame("Java AWT Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      headerLabel = new Label();
      headerLabel.setAlignment(Label.CENTER);
      statusLabel = new Label();        
      statusLabel.setAlignment(Label.CENTER);
      statusLabel.setSize(350,100);

      msglabel = new Label();
      msglabel.setAlignment(Label.CENTER);
      msglabel.setText("Welcome to TutorialsPoint AWT Tutorial.");

      controlPanel = new Panel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }

   private void showGridLayoutDemo(){
      headerLabel.setText("Layout in action: GridLayout");      

      Panel panel = new Panel();
      panel.setBackground(Color.darkGray);
      panel.setSize(300,300);
      GridLayout layout = new GridLayout(0,3);
      layout.setHgap(10);
      layout.setVgap(10);
      
      panel.setLayout(layout);        
      panel.add(new Button("Button 1"));
      panel.add(new Button("Button 2")); 
      panel.add(new Button("Button 3")); 
      panel.add(new Button("Button 4")); 
      panel.add(new Button("Button 5")); 
      controlPanel.add(panel);
      mainFrame.setVisible(true);  
   }
}

编译程序，使用命令提示符。进入到D:/> AWT，然后键入以下命令。

D:AWT>javac comyiibaiguiAwtlayoutDemo.java

如果没有错误出现，这意味着编译成功。使用下面的命令来运行程序。

D:AWT>java com.yiibai.gui.AwtlayoutDemo

验证下面的输出