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package c_port_packageBJTeacher;
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Color;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.UIManager;
/**
* Java中CardLayout布局管理器使用的小例子
*/
public class MyCardLayoutChatLogWindow extends JFrame {
/**
*
*/
private static final long serialVersionUID = 1L;
private JPanel pane = null; // 主要的JPanel,该JPanel的布局管理将被设置成CardLayout
private JPanel p = null; // 放按钮的JPanel
private CardLayout card = null; // CardLayout布局管理器
private JButton button_1 = null; // 上一步
private JButton button_2 = null; // 下一步
private JButton b_1 = null, b_2 = null, b_3 = null; // 三个可直接翻转到JPanel组件的按钮
private JPanel p_1 = null, p_2 = null, p_3 = null; // 要切换的三个JPanel
private JTextArea jta0 = null,jta1 =null,jta2= null;
public MyCardLayoutChatLogWindow(String str) {
super("CardLayout Test");
int len = str.length();
char[] ch = str.toCharArray();
StringBuilder str0 = new StringBuilder("");
for(int i = 0;i<len;i++){
if(i%25==0||i==0){
str0.append(String.valueOf(ch[i])+"<br>");
}else{
str0.append(String.valueOf(ch[i]));
}
}
String str1 = str0.toString();
int height = this.getHeight();
int width = this.getWidth();
try {
// 将LookAndFeel设置成Windows样式
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch (Exception ex) {
ex.printStackTrace();
}
/**创建一个具有指定的水平和垂直间隙的新卡片布局*/
card = new CardLayout(5, 5);
pane = new JPanel(card); // JPanel的布局管理将被设置成CardLayout
p = new JPanel(); // 构造放按钮的JPanel
button_1 = new JButton("< 上一步");
button_2 = new JButton("下一步 >");
b_1 = new JButton("1");
b_2 = new JButton("2");
b_3 = new JButton("3");
b_1.setMargin(new Insets(2,2,2,2));
b_2.setMargin(new Insets(2,2,2,2));
b_3.setMargin(new Insets(2,2,2,2));
p.add(button_1);
p.add(b_1);
p.add(b_2);
p.add(b_3);
p.add(button_2);
p_1 = new JPanel();
p_2 = new JPanel();
p_3 = new JPanel();
p_1.setBackground(Color.RED);
p_2.setBackground(Color.BLUE);
p_3.setBackground(Color.GREEN);
p_1.add(new JLabel(str1));
p_2.add(new JLabel("JPanel_2"));
p_3.add(new JLabel("JPanel_3"));
pane.add(p_1, "p1");
pane.add(p_2, "p2");
pane.add(p_3, "p3");
/**下面是翻转到卡片布局的某个组件,可参考API中的文档*/
button_1.addActionListener(new ActionListener(){ // 上一步的按钮动作
public void actionPerformed(ActionEvent e) {
card.previous(pane);
}
});
button_2.addActionListener(new ActionListener(){ // 下一步的按钮动作
public void actionPerformed(ActionEvent e) {
card.next(pane);
}
});
b_1.addActionListener(new ActionListener() { // 直接翻转到p_1
public void actionPerformed(ActionEvent e) {
card.show(pane, "p1");
}
});
b_2.addActionListener(new ActionListener() { // 直接翻转到p_2
public void actionPerformed(ActionEvent e) {
card.show(pane, "p2");
}
});
b_3.addActionListener(new ActionListener() { // 直接翻转到p_3
public void actionPerformed(ActionEvent e) {
card.show(pane, "p3");
}
});
this.getContentPane().add(pane);
this.getContentPane().add(p, BorderLayout.SOUTH);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setSize(330, 720);
this.setVisible(true);
}
public static void main(String[] args) {
new MyCardLayoutChatLogWindow("<html>加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油加油</html>");
}
}
if(i%25==0||i==0){
改成
if(i%25==0&&i!=0){