分析以下代码package Test; public class ThisTest { String name; private void setName(String name) { this.name = name; System.out.println("setName: " + this.name); } private void thisTest(String name) { this.setName(name); System.out.println("thisTest: " + this.name); } public static void main(String[] args) { ThisTest tt = new ThisTest(); tt.setName("Yida"); tt.thisTest("Jenny"); } }

这段代码定义了一个名为 ThisTest 的类，该类包含两私有方法 setName 和 thisTest，以及一个公共的静态方法 main。setName 方法将传入的 name 参数赋值给类变量 name，并且使用 this 关键字引用该类的当前实例。thisTest 方法在调用 setName 方法后输出 name 变量的值。main 方法创建一个 ThisTest 类的实例 tt，并先调用 setName 方法将 name 设置为 "Yida"，然后调用 thisTest 方法将 name 设置为 "Jenny" 并输出 name 变量的值。最终的输出结果应该为：

setName: Yida
thisTest: Jenny

相关问题

package com.unit2.test; public class Test4 { public static void main(String[] args) { Salary s=new Salary("员工A","北京",3,3600.00); Employee e=new Salary("员工B","上海",2,2400.00); System.out.println("使用Salary的引用调用mailcheck--"); s.mailCheck(); System.out.println("\n使用employee的引用调用mailcheck--"); e.mailCheck(); } public class Employee{ private String name; private String address; private int number; public Employee(String name,String address,int number) { System.out.println("Employee 构造函数"); this.name=name; this.address=address; this.number=number; } public void mailCheck() { System.out.println("邮寄支票给："+this.name+" "+this.address); } public String toString() { return name+" "+address+" "+number; } public String getName() { return name; } public String getAddress() { return address; } public void setAddress(String newAddress) { address=newAddress; } public int getNumber() { return number; } } public class Salary extends Employee { private double salary;//全年工资 public Salary(String name,String address,int number,double salary) { super(name,address,number); setSalary(salary); } public void mailCheck() { System.out.println("Salary类的mailcheck方法"); System.out.println("邮寄支票给："+getName()+",工资为"+salary); } public double getSalary() { return salary; } public void setSalary(double newSalary) { if(newSalary>=0.0) { salary=newSalary; } } public double computePay() { System.out.println("计算工资，付给："+getName()); return salary/52; } } }更正以上代码错误

在以上代码中存在两个问题：

1. Test4类中定义了两个public类。Java中一个源文件中只能有一个public类，因此需要将Employee类和Salary类单独定义在不同的源文件中。

2. 在Employee类中没有定义getSalary()和setSalary()方法，而这两个方法在Salary类中被使用了，因此需要在Employee类中添加这两个方法。

以下是修改后的代码：

Employee.java

package com.unit2.test;

public class Employee{
    private String name;
    private String address;
    private int number;
    private double salary;

    public Employee(String name, String address, int number) {
        System.out.println("Employee 构造函数");
        this.name = name;
        this.address = address;
        this.number = number;
    }

    public void mailCheck() {
        System.out.println("邮寄支票给：" + this.name + " " + this.address);
    }

    public String toString() {
        return name + " " + address + " " + number;
    }

    public String getName() {
        return name;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String newAddress) {
        address = newAddress;
    }

    public int getNumber() {
        return number;
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double newSalary) {
        if (newSalary >= 0.0) {
            salary = newSalary;
        }
    }
}

Salary.java

package com.unit2.test;

public class Salary extends Employee {
    private double salary;//全年工资

    public Salary(String name, String address, int number, double salary) {
        super(name, address, number);
        setSalary(salary);
    }

    public void mailCheck() {
        System.out.println("Salary类的mailcheck方法");
        System.out.println("邮寄支票给：" + getName() + ",工资为" + salary);
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double newSalary) {
        if (newSalary >= 0.0) {
            salary = newSalary;
        }
    }

    public double computePay() {
        System.out.println("计算工资，付给：" + getName());
        return salary / 52;
    }
}

Test4.java

package com.unit2.test;

public class Test4 {
    public static void main(String[] args) {
        Salary s = new Salary("员工A", "北京", 3, 3600.00);
        Employee e = new Salary("员工B", "上海", 2, 2400.00);
        System.out.println("使用Salary的引用调用mailcheck--");
        s.mailCheck();
        System.out.println("\n使用employee的引用调用mailcheck--");
        e.mailCheck();
    }
}

package LeiDeJiCheng; public abstract class Animal { private String name; private int age; //构造器 public Animal(){ }//无参 public Animal(String name,int age){ this.name = name; this.age = age; }//有参 public abstract void eat(); public String getName(){ return name; } public void setName(String name){ this.name = name; } public int getAge(){ return age; } } class Rabbit extends Animal{ public Rabbit(){ } public Rabbit(String name,int age){ super(name, age); } @Override public void eat(){ System.out.println("兔子吃胡萝卜"); } } class Dog extends Animal{ public Dog(){} public Dog(String name,int age){ super(name, age); } @Override public void eat(){ System.out.println("狗吃shit"); } } class Friog extends Animal { public Friog(){} public Friog(String name,int age){ super(name,age); } @Override public void eat(){ System.out.println("青蛙吃虫子"); } }

//测试类
public class Test {
public static void main(String[] args) {
Animal animal1 = new Rabbit("小白兔", 2);
Animal animal2 = new Dog("旺财", 3);
Animal animal3 = new Friog("青蛙", 1);

animal1.eat();
animal2.eat();
animal3.eat();
}
}

//输出：
//兔子吃胡萝卜
//狗吃shit
//青蛙吃虫子