Swing GridLayout佈局類

GridLayout類將組件排列在一個長方形的網格。

類聲明

以下是聲明 java.awt.GridLayout類：

public class GridLayout extends Object implements LayoutManager, Serializable

類構造函數

S.N.

構造函數 & 描述

GridLayout()
Creates a grid layout with a default of one column per component, in a single row.

GridLayout(int rows, int cols)
Creates a grid layout with the specified number of rows and columns.

GridLayout(int rows, int cols, int hgap, int vgap)
Creates a grid layout with the specified number of rows and columns.

類方法

S.N.

方法 & 描述

void addLayoutComponent(String name, Component comp)
Adds the specified component with the specified name to the layout.

int getColumns()
Gets the number of columns in this layout.

int getHgap()
Gets the horizontal gap between components.

int getRows()
Gets the number of rows in this layout.

int getVgap()
Gets the vertical gap between components.

void layoutContainer(Container parent)
Lays out the specified container using this layout.

Dimension minimumLayoutSize(Container parent)
Determines the minimum size of the container argument using this grid layout.

Dimension preferredLayoutSize(Container parent)
Determines the preferred size of the container argument using this grid layout.

void removeLayoutComponent(Component comp)
Removes the specified component from the layout.

void setColumns(int cols)
Sets the number of columns in this layout to the specified value.

void setHgap(int hgap)
Sets the horizontal gap between components to the specified value.

void setRows(int rows)
Sets the number of rows in this layout to the specified value.

void setVgap(int vgap)
Sets the vertical gap between components to the specified value.

String toString()
Returns the string representation of this grid layout's values.

方法繼承

這個類從以下類繼承的方法：

java.lang.Object

GridLayout Example

選擇使用任何編輯器創建以下java程序在 D:/ > SWING > com > yiibai > gui >

SwingLayoutDemo.java

package com.yiibai.gui; import javax.swing.*; public class SwingLayoutDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; private JLabel msglabel; public SwingLayoutDemo(){ prepareGUI(); } public static void main(String[] args){ SwingLayoutDemo swingLayoutDemo = new SwingLayoutDemo(); swingLayoutDemo.showGridLayoutDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java SWING Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); headerLabel = new JLabel("",JLabel.CENTER ); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); controlPanel = new JPanel(); 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"); JPanel panel = new JPanel(); 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 JButton("Button 1")); panel.add(new JButton("Button 2")); panel.add(new JButton("Button 3")); panel.add(new JButton("Button 4")); panel.add(new JButton("Button 5")); controlPanel.add(panel); mainFrame.setVisible(true); } }

編譯程序，使用命令提示符。到 D:/ > SWING 然後輸出以下命令。

D:SWING>javac comyiibaiguiSwingLayoutDemo.java

如果沒有錯誤出現，這意味着編譯成功。使用下面的命令來運行程序。

D:SWING>java com.yiibai.gui.SwingLayoutDemo

驗證下面的輸出

SWING