public class Test{ public static void main(String [] args){ Helmet h = new Helmet("1001","white","2016-12-12"); Worker w = new Worker("zhang", 55, 2874,3,h); w.display(); } } class Worker { private String name; private int age; private double salary; private int level; private Helmet myHelmet; public Worker(String name,int age,double salary,int level,Helmet myHelmet){ } public void setName(String name){ this.name=name; } public String getName(){ return this.name; } public void setAge(int age){ this.age=age; } public int getAge(){ return this.age; } public void setSalary(double salary){ this.salary=salary; } public double getSalary(){ return this.salary; } public void setLevel(int level){ this.level=level; } public int getLevel(){ return this.level; } public void setHelmet(Helmet myHelmet){ this.myHelmet=myHelmet; } public Helmet getHelmet(){ return this.myHelmet; } public void display(){ } } class Helmet{ private String code; private String color; private String checkDate; public Helmet(String code, String color,String checkDate){ this.code = code; this.color = color; this.checkDate = checkDate; } public void display(){ System.out.println("Helmet=" + code+","+color+","+checkDate); } }补全代码

class Worker {
private String name;
private int age;
private double salary;
private int level;
private Helmet myHelmet;

public Worker(String name, int age, double salary, int level, Helmet myHelmet) {
this.name = name;
this.age = age;
this.salary = salary;
this.level = level;
this.myHelmet = myHelmet;
}

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

public String getName() {
return this.name;
}

public void setAge(int age) {
this.age = age;
}

public int getAge() {
return this.age;
}

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

public double getSalary() {
return this.salary;
}

public void setLevel(int level) {
this.level = level;
}

public int getLevel() {
return this.level;
}

public void setHelmet(Helmet myHelmet) {
this.myHelmet = myHelmet;
}

public Helmet getHelmet() {
return this.myHelmet;
}

public void display() {
System.out.println("Name: " + this.name);
System.out.println("Age: " + this.age);
System.out.println("Salary: " + this.salary);
System.out.println("Level: " + this.level);
System.out.println("Helmet: ");
this.myHelmet.display();
}
}

class Helmet {
private String code;
private String color;
private String checkDate;

public Helmet(String code, String color, String checkDate) {
this.code = code;
this.color = color;
this.checkDate = checkDate;
}

public void display() {
System.out.println("Code: " + this.code);
System.out.println("Color: " + this.color);
System.out.println("Check Date: " + this.checkDate);
}
}

public class Test {
public static void main(String[] args) {
Helmet h = new Helmet("1001", "white", "2016-12-12");
Worker w = new Worker("zhang", 55, 2874, 3, h);
w.display();
}
}