对象的关联

对象的关联：简单的说，在一个对象中使用了另一个对象

ublic class RelationalTest {
    public static void main(String[] args) {
        Teacher teacher=new Teacher("张三",18,new Computer("2.0GHz","16G","1T"));
        System.out.println(teacher);
        System.out.println(teacher.say());
    }
}
 
class Teacher{
    private String name;
    private int age;
    private Computer computer;
    public Teacher() {
    }
    public Teacher(String name, int age, Computer computer) {
        this.name = name;
        this.age = age;
        this.computer = computer;
    }
    public void setName(String name) {
        this.name = name;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public void setComputer(Computer computer) {
        this.computer = computer;
    }
    public String getName() {
        return name;
    }
    public int getAge() {
        return age;
    }
    public Computer getComputer() {
        return computer;
    }
    public String say(){
        return "姓名："+name+" 年龄："+age+" 我有一台电脑："+computer;
    }
}
 
class   Computer{
    private String cpu;
    private  String ram;
    private  String hdd;
    public Computer() {
    }
    public Computer(String cpu, String ram, String hdd) {
        this.cpu = cpu;
        this.ram = ram;
        this.hdd = hdd;
    }
    public void setCpu(String cpu) {
        this.cpu = cpu;
    }
    public void setRam(String ram) {
        this.ram = ram;
    }
    public void setHdd(String hdd) {
        this.hdd = hdd;
    }
    public String getCpu() {
        return cpu;
    }
    public String getRam() {
        return ram;
    }
    public String getHdd() {
        return hdd;
    }
    public String getDetails(){
        return "cpu:"+getCpu()+" ram:"+getRam()+" hdd"+getHdd();
    }
}