package 练习;import java.util.Scanner;import javax.swing.JOptionPane;public class ATM1 {    public static int xuehao[] = new int[10];    public static String name[] = new String[10];    public static int chengji[] = new int[10];    public static int i = 0;    public static void main(String[] args) {        JOptionPane.showMessageDialog(null, "欢迎光临");        String zhanghu = "123456";        String mima = "123456";        boolean iso = denglu(zhanghu, mima);        if (iso) {            while (true) {                String b = JOptionPane.showInputDialog(null,                        "1、添加\n2、显示\n3、删除\n4、修改\n5、排序\n6、查询\n7");                int a = Integer.parseInt(b);                switch (a) {                case 1:                    tianjia();                    break;                case 2:                    xianshi();                    break;                case 3:                    shanchu();                    break;                case 4:                    xiugai();                    break;                case 5:                    paixu();                    break;                case 6:                    chaxu();                    break;                case 7:                    System.exit(0);                    ;                    break;                default:                    JOptionPane.showMessageDialog(null, "只能输入1-7");                }            }        }    }//查询 方法    private static void chaxu() {        int cz = chazhao();        if (cz != -1) {            JOptionPane.showMessageDialog(null, xuehao[cz] + name[cz]                    + chengji[cz]);        }    }//排序方法    private static void paixu() {        for (int n = 0; n < i; n++) {            for (int j = n + 1; j < i; j++) {                if (chengji[n] < chengji[j]) {                    int s = chengji[n];                    chengji[n] = chengji[j];                    chengji[j] = s;                    String xm = name[n];                    name[n] = name[j];                    name[j] = xm;                    int xh = xuehao[n];                    xuehao[n] = xuehao[j];                    xuehao[j] = s;                }            }        }        xianshi();    }//修改方法    private static void xiugai() {        int n = chazhao();        if (n != -1) {            String str = JOptionPane.showInputDialog(null, "请输入修改的学号");            String str1 = JOptionPane.showInputDialog(null, "请输入修改的姓名");            String str2 = JOptionPane.showInputDialog(null, "请输入修改的成绩");            xuehao[n] = Integer.parseInt(str);            name[n] = str1;            chengji[n] = Integer.parseInt(str2);        }    }//删除方法    private static void shanchu() {        int s = chazhao();        if (s != -1) {            for (int n = s; n < i; n++) {                xuehao[n] = xuehao[n + 1];                name[n] = name[n + 1];                chengji[n] = chengji[n + 1];                i--;            }        }    }//显示方法    private static void xianshi() {        String info = "";        for (int n = 0; n < i; n++) {            info += xuehao[n] + name[n] + chengji[n] + "\n";        }        JOptionPane.showMessageDialog(null, info);    }//添加方法    private static void tianjia() {        String str = JOptionPane.showInputDialog(null, "请输入学号");        String str1 = JOptionPane.showInputDialog(null, "请输入姓名");        String str2 = JOptionPane.showInputDialog(null, "请输入成绩");        xuehao[i] = Integer.parseInt(str);        name[i] = str1;        chengji[i] = Integer.parseInt(str2);        i++;    }//登陆方法    public static boolean denglu(String zhanghu, String mima) {        for (int n = 3; n > 0; n--) {            String str = JOptionPane.showInputDialog(null, "请输入账户");            String str1 = JOptionPane.showInputDialog(null, "请输入密码");            if (str.equals(str1) && str1.equals(str1)) {                return true;            }            if (n == 1) {                JOptionPane.showMessageDialog(null, "非法输入");                return false;            }            JOptionPane.showMessageDialog(null, "你的输入有误，请重新输入" + (n - 1));        }        return false;    }//查找方法    public static int chazhao() {        int index = -1;        String str = JOptionPane.showInputDialog(null, "请输入要查找的人");        for (int n = 0; n < i; n++) {            if (str.equals(name[n])) {                return n;            }            JOptionPane.showMessageDialog(null, "查无此人");        }        return -1;    }}