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初学者,关于list

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菜鸟,关于list
package my_project;

import java.util.ArrayList;

class employee {
private String name;
private float salary;
private String idno;
public Object getIdno;

public employee(String name, float salary, String idno) {
this.name = name;
this.salary = salary;
this.idno = idno;
}

public void setName(String name) {
this.name = name;
}

public String getName() {
return name;
}

public void setSalary(float salary) {
this.salary = salary;
}

public float getSalary() {
return salary;
}

public void setIdno(String idno) {
this.idno = idno;
}

public String getIdno() {
return idno;
}

}

class employer {
// ArrayList al = new ArrayList();
ArrayList<employee> al = null;


public employer() {
al = new ArrayList<employee>();
}

public void addemp(employee emp) {
al.add(emp);
}

public void show_info(String idno) {
for (int i = 0; i < al.size(); i++) {
employee employee = (employee) al.get(i);
if (employee.getIdno.equals(idno)) {
System.out.println("该员工的信息是:" + employee.getName() + " "
+ employee.getIdno() + " " + employee.getSalary());
}
}
}
}

public class Array_List {

public static void main(String[] args) {
employee emp1 = new employee("maozedong", 1000, "SB001");
employer eeeee = new employer();
eeeee.al.add(emp1);
eeeee.show_info("SB001");
System.out.println("第1个人的信息:" + emp1.getName() + " ;" + emp1.getIdno()
+ " ;" + emp1.getSalary());

}

}




/**
上面的代码报错了,请问各位牛人,怎么改啊?
显示出来他的信息!谢谢了!
*/

------解决方案--------------------
首先提醒楼主,java命名规范要求类的首字母大写,你这代码还不符合规范
代码里面的主要问题就是Employee的getIdno这个应该是调用方法,代码如下
Java code


import java.util.ArrayList;

class Employee {
    private String name;
    private float salary;
    private String idno;
//    public Object getIdno;

    public Employee(String name, float salary, String idno) {
        this.name = name;
        this.salary = salary;
        this.idno = idno;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setSalary(float salary) {
        this.salary = salary;
    }

    public float getSalary() {
        return salary;
    }

    public void setIdno(String idno) {
        this.idno = idno;
    }

    public String getIdno() {
        return idno;
    }

}

class Employer {
    // ArrayList al = new ArrayList();
    ArrayList<Employee> al = null;


    public Employer() {
        al = new ArrayList<Employee>();
    }

    public void addemp(Employee emp) {
        al.add(emp);
    }

    public void show_info(String idno) {
        for (int i = 0; i < al.size(); i++) {
            Employee employee =  al.get(i);
            if (employee.getIdno().equals(idno)) { //这里进行了修改
                System.out.println("该员工的信息是:" + employee.getName() + " "
                        + employee.getIdno() + " " + employee.getSalary());
            }
        }
    }
}

public class Array_List {

    public static void main(String[] args) {
        Employee emp1 = new Employee("maozedong", 1000, "SB001");
        Employer eeeee = new Employer();
        eeeee.al.add(emp1);
        eeeee.show_info("SB001");
        System.out.println("第1个人的信息:" + emp1.getName() + " ;" + emp1.getIdno()
                + " ;" + emp1.getSalary());

    }

}

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