import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.util.ArrayList;public class demo1 {    /**     * @param args     * @throws IOException      */    public static void main(String[] args) throws IOException {        // TODO Auto-generated method stub        //创建雇员管理对象        empmanage em = new empmanage();        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));        //做个简易的菜单        while(true)        {            System.out.println("请输入你要进行的操作:");            System.out.println("1:表示要添加一个雇员");            System.out.println("2:查找一个雇员");            System.out.println("3:修改一个雇员工资");            System.out.println("4:删除一个雇员");            System.out.println("5:退出");            String opertype = br.readLine();            if(opertype.equals("1"))            {                System.out.println("请输入编号");                String empno = br.readLine();                System.out.println("请输入名字");                String name = br.readLine();                System.out.println("请输入薪资");                float sal = Float.parseFloat(br.readLine());                emp emp = new emp(empno,name,sal);                em.addemp(emp);            }            else if(opertype.equals("2"))            {                System.out.println("请输入编号");                String empno = br.readLine();                em.showinfo(empno);            }            else if(opertype.equals("3"))            {                System.out.println("请输入编号 ");                String empno = br.readLine();                System.out.println("请输入新的工资");                float newsal = Float.parseFloat(br.readLine());                em.updatesal(empno, newsal);            }            else if(opertype.equals("4"))            {                System.out.println("请输入雇员号");                String empno = br.readLine();                em.delemp(empno);            }else if(opertype.equals("5"))            {                System.exit(0);            }        }    }}//雇员管理类class empmanage{    private ArrayList a1 = null;    //构造    public empmanage() {        a1 = new ArrayList();    }    //加入员工    public void addemp(emp emp){        a1.add(emp);    }    //显示员工的相关信息    public void showinfo(String empno) {        //遍历整个ArrayList        for(int i=1;i<a1.size();i++)        {            //去除emp对象            emp emp = (emp)a1.get(i);            //比较编号            if(emp.getEmpNo().equals(empno))             {                System.out.println("找到雇员信息：");                System.out.println("编号= "+emp.getEmpNo());                System.out.println("名字= "+emp.getName());                System.out.println("工资= "+emp.getSal());            }        }    }    //修改工资    public void updatesal(String empno,float newsal) {        for(int i=0;i<a1.size();i++)        {            emp emp = (emp)a1.get(i);            if(emp.getEmpNo().equals(empno))            {                //修改薪水                emp.setSal(newsal);            }        }    }    //删除雇员    public void delemp(String empno) {        for(int i=0;i<a1.size();i++)        {            emp emp =  (emp)a1.get(i);            if(emp.getEmpNo().equals(empno))            {                a1.remove(i);            }        }    }        }/** * @author wyl * 雇员类 */class emp {    //学号    private String empNo;    private String name;    private float sal;    //构造函数    public emp(String empNo, String name, float sal) {        super();        this.empNo = empNo;        this.name = name;        this.sal = sal;    }        public String getEmpNo() {        return empNo;    }    public void setEmpNo(String empNo) {        this.empNo = empNo;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public float getSal() {        return sal;    }    public void setSal(float sal) {        this.sal = sal;    }    }