我想的是index不会变，就可以跟原来的界面一样使用，但是为什么会多了
package recite;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import java.util.List;
public class fmabtn {
public static List<String>list_Array;
public static JFrame jframe=new JFrame("日语学习");
public static JPanel Win=new JPanel();
public static JLabel headlabel=new JLabel();
public static JLabel label=new JLabel();
public static JLabel firstlabel=new JLabel("日本语学习软件");
public static String sum1="",sum2="",sum3="";
protected static int index;
protected static int n=0;
public static setBtnColor begin=new setBtnColor("开始",0);
public static setBtnColor last=new setBtnColor("上一个单词",1);
public static setBtnColor next=new setBtnColor("下一个单词",1);
public static setBtnColor restart=new setBtnColor();
private static String []field= {"日汉","日语","形态","中文"};
public static void main(String []args)throws IOException {
Icon ret=new ImageIcon("loop.jpg");
ImageIcon java=new ImageIcon("java.jpg");
restart.setIcon(ret);
firstlabel.setFont(new getAllFont().getSomeFont());
Win.setBackground(Color.LIGHT_GRAY);
Win.add(begin);
Win.add(firstlabel);
jframe.add(Win);
jframe.setFont(new getAllFont().getHeaderFont());
jframe.setResizable(false);//固定窗口大小
jframe.setVisible(true);
jframe.setSize(400,300);//在显示之前加入panel组件
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
list_Array=new listarray("n3单词").getArray();
for(String page:field) {
sum2+=page+"<br>";
}
headlabel.setText("<html>"+sum2+"</html>");sum2="";
begin.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
index=8;
System.out.println("begin:"+index);
Win.repaint();
Win.remove(begin);
Win.remove(firstlabel);
last.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
System.out.println("last:"+index);
if(index>=8) {for(n=index-8;n<index-4;n++) {
sum1+=list_Array.get(n)+"<br>";}}
index-=4;
if(index<3) {label.setText("开头没有更多了，点击下一个单词");}
else{label.setText("<html>"+sum1+"</html>");sum1="";}}});
next.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("next:"+index);
if(index+4<=list_Array.size()) {for(n=index;n<index+4;n++) {
sum1+=list_Array.get(n)+"<br>";}}
index+=4;
if(index>list_Array.size()){label.setText("结尾没有更多了，点击上一个单词");}
else if(index<=list_Array.size()) {label.setText("<html>"+sum1+"</html>");sum1="";}}});
restart.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
System.out.println("restart:"+index);
{jframe.dispose();
jframe.setVisible(true);
Win.repaint();
Win.removeAll();
Win.add(begin);
Win.setVisible(true);
jframe.add(Win);
begin.setLocation(150,100);
begin=begin;
last=last;
next=next;
restart=restart;
System.out.println("restart后的:"+index);
}}});
{for(int i=4;i<8;i++) {
sum2+=list_Array.get(i)+"<br>";}}
label.setText("<html>"+sum2+"</html>");sum2="";
Win.setLayout(null);
last.setBounds(-10, 200, 100,75);
next.setBounds(300,200,100,75);
label.setBounds(50,0,400,160);
headlabel.setBounds(10,0,400,160);
restart.setBounds(300,50,60,60);
Win.add(label);
Win.add(last);
Win.add(next);
Win.add(restart);
Win.add(headlabel);
jframe.setSize(400,300);
jframe.setVisible(true);
}});
}}
