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1、第一个 LinListpublic class LinList implements List Node head;Node current;int size;LinList()head = current = new Node(null);public void index(int i) throws Exceptionif(i size - 1)throw new Exception(“参数错误！“); if(i = -1) current=head;return;current = head.next;int j = 0;while(current != null) index(i -
2、1);current.setNext(new Node(obj,current.next);size +;public String delete(int i) throws Exceptionif(size = 0)throw new Exception(“链表已空无元素可删！“); if(i size - 1)throw new Exception(“参数错误！“); index(i - 1);String obj = current.next.getElement();current.setNext(current.next.next);size -;return obj;public
3、int size()return size;public boolean isEmpty()return size = 0;public String getData(int i) throws Exceptionif(i size - 1)throw new Exception(“参数错误！“); index(i);return current.getElement();第二个 接口Listpublic interface Listpublic void insert(int i,String obj) throws Exception;public Object delete(int i)
4、 throws Exception;public String getData(int i) throws Exception;public int size();public boolean isEmpty();第三个 主函数 Main1import java.awt.Button; import java.awt.Color; import java.awt.Container; import java.awt.Font; import java.awt.TextArea; import java.awt.event.ActionEvent; import java.awt.event.A
5、ctionListener; import java.awt.event.WindowEvent; import java.awt.event.WindowFocusListener; import java.awt.event.WindowListener; import java.awt.List; import java.util.StringTokenizer;import javax.swing.*;import javax.swing.JFrame;public class Main1 extends JFrame private static JFrame frame; priv
6、ate JLabel textJLabel; private JLabel textJLabel1; private JLabel textJLabel2; private JLabel textJLabel3; private JLabel picture; private Button button1; private Button button2; private Button button3; private Button button4; private Button button5; private Button button8; private Button button9; p
7、rivate Button button10; private JLabel label1; private JLabel label2; private JLabel label3;private JTextField text1;private JTextField text2;private JTextField text3;private JButton button6;private JLabel label4; private JLabel label5; private JLabel label6; private JLabel label7;private JTextField
8、 text4;private JTextField text5;private JTextField text6;private JTextField text7;private JButton button7;LinList linlist1=new LinList();public int num=0;public int tidai;public StringTokenizer str;public Main1() creat(); private void creat() Container contentPane=getContentPane(); contentPane.setBa
9、ckground(Color.ORANGE); contentPane.setLayout(null);textJLabel=new JLabel(); textJLabel.setText(“welcome to sale system“);textJLabel.setBounds(160, 10, 275, 40);textJLabel.setFont(new Font(“宋体“,Font.BOLD,20);textJLabel.setHorizontalAlignment(JLabel.CENTER);contentPane.add(textJLabel);textJLabel1=new
10、 JLabel();textJLabel1.setText(“Number“);textJLabel1.setBounds(185, 70, 100, 20);contentPane.add(textJLabel1);textJLabel2=new JLabel();textJLabel2.setText(“Name“);textJLabel2.setBounds(285, 70, 100, 20);contentPane.add(textJLabel2);textJLabel3=new JLabel();textJLabel3.setText(“Price“);textJLabel3.set
11、Bounds(385, 70, 100, 20);contentPane.add(textJLabel3);button1=new Button(“添加“);button1.setBounds(30,75,100,40);contentPane.add(button1);button2=new Button(“修改“); button2.setBounds(30,165,100,40);contentPane.add(button2);button3=new Button(“删除“);button3.setBounds(30,255,100,40);contentPane.add(button
12、3);button4=new Button(“排序“);button4.setBounds(470,75,100,40);contentPane.add(button4);button5=new Button(“退出“);button5.setBounds(250,300,100,50);contentPane.add(button5);final List list=new List(500,false);list.setBounds(180, 90, 250, 180);contentPane.add(list);button8=new Button(“查询“);button8.setBo
13、unds(475, 165, 100, 40);contentPane.add(button8);button10=new Button(“显示“);button10.setBounds(475, 255, 100, 40);contentPane.add(button10);setTitle(“welcome“);setSize(600,450);setLocation(400, 180);setVisible(true);setResizable(false);button1.addActionListener(new ActionListener() Override public vo
14、id actionPerformed(ActionEvent e) / TODO Auto-generated method stub final JFrame contentPane=new JFrame(); contentPane.setBackground(Color.white); contentPane.setLayout(null);label1=new JLabel();label1.setText(“编号“);label1.setBounds(30, 35, 100, 21);contentPane.add(label1);text1=new JTextField();tex
15、t1.setText(null);text1.setBounds(65, 35, 150, 21);contentPane.add(text1);label2=new JLabel();label2.setText(“名称“);label2.setBounds(30, 65, 100, 21);contentPane.add(label2);text2=new JTextField();text2.setText(null);text2.setBounds(65, 65, 150, 21);contentPane.add(text2);label3=new JLabel();label3.se
16、tText(“价格“);label3.setBounds(30, 95, 100, 21);contentPane.add(label3);text3=new JTextField();text3.setText(null);text3.setBounds(65, 95, 150, 21);contentPane.add(text3);button6=new JButton();button6.setText(“确定“);button6.setBounds(100,125,60,25);contentPane.add(button6);contentPane.setTitle(“录入“);contentPane.setSize(275,220);contentPane.setLocation(520, 300);contentPane.setVisible(true);contentPane.setResizable(false);button6.addActionListene
