cardlayoutframe.java~11~
来自「java2参考大全上的例子的源码和自己的理解.」· JAVA~11~ 代码 · 共 96 行
JAVA~11~
96 行
package CardLayoutFrame;//CardLayoutFrame.javaimport java.awt.*;import javax.swing.*;import java.awt.event.*;public class CardLayoutFrame extends JFrame { JButton btPrevious = new JButton("前一张"); JButton btNext = new JButton("下一张"); /* A flow layout arranges components in a left-to-right flow, much like lines of text in a paragraph. Flow layouts are typically used to arrange buttons in a panel. It will arrange buttons left to right until no more buttons fit on the same line. Each line is centered. */ JPanel flowPanel = new JPanel(new FlowLayout()); /* A CardLayout object is a layout manager for a container. It treats each component in the container as a card. Only one card is visible at a time, and the container acts as a stack of cards. The first component added to a CardLayout object is the visible component when the container is first displayed. */ JPanel cardPanel = new JPanel(new CardLayout()); int currentIndex = 0; public CardLayoutFrame() { this.getContentPane().add(flowPanel,BorderLayout.SOUTH); this.getContentPane().add(cardPanel,BorderLayout.CENTER); cardPanel.add(getCard(1),"Card1"); cardPanel.add(getCard(2),"Card2"); flowPanel.add(btPrevious); flowPanel.add(btNext); ActionListener listener = new ActionListener() { public void actionPerformed(ActionEvent e) { switchCard(); } }; btPrevious.addActionListener(listener); btNext.addActionListener(listener); this.setSize(300,200); this.setTitle("GardLayoutDemo"); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.show(); } JPanel getCard(int index){ JPanel panel = new JPanel(new BorderLayout()); /* A border layout lays out a container, arranging and resizing its components to fit in five regions: north, south, east, west, and center. Each region may contain no more than one component, and is identified by a corresponding constant: NORTH, SOUTH, EAST, WEST, and CENTER. When adding a component to a container with a border layout, use one of these five constants, for example: Panel p = new Panel(); p.setLayout(new BorderLayout()); p.add(new Button("Okay"), BorderLayout.SOUTH); */ JLabel label = new JLabel("<HTML><h1 style=color:red>"+ "这是第"+index+"张卡片"+ "</h1></HTML>" ); // JLabel label = new JLabel( "这是第"+index+"张卡片");//也可以，只是字体不同 label.setHorizontalAlignment(JLabel.CENTER); panel.add(label); return panel; } void switchCard(){ //Gets the layout manager for this container. CardLayout cl = (CardLayout)cardPanel.getLayout(); if (currentIndex==0){ currentIndex++; /* public void show(Container\u00A0parent, String\u00A0name) Flips to the component that was added to this layout with the specified name, using addLayoutComponent. If no such component exists, then nothing happens. */ cl.show(cardPanel,"Card2"); }else{ currentIndex--; cl.show(cardPanel,"Card1"); } } public static void main(String[] args) { CardLayoutFrame frame = new CardLayoutFrame(); }}⌨️ 快捷键说明
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