Diagram 문제

ex1)
public class A{
	private B b
}

public class B{
	private String f1;
	private int f2;
}

ex2)

public class Test1{
	private Test2 t2;
    
    public Test3 method1(){
        return new Test3;
    }
}

public class Test2{
	private int f1;
}

public class Test3{
	private String str;
    public String getStr();
    	return str;
}

	public void setStr(String str){
    	this.str = str;
    }

ex3)

public abstract class Parent{
	public void parentMethod1(){}
    protected abstract void print();
}

public class Child extends Parent{
	private String name;
    public void childMethod(){}
    protected void print(){}
}

ex4)

public abstract class Shape{
	public void draw(){}
    public void erase(){}
    public int getLength(){
    	return length;
    }
    protected abstract double getArea();
}

public class Triangle extends Shape implements Resizable{
	public boolean isEquilateral(){}
    protected double getAtrea(){}
    public void resize(){}
}

public interface Resizable{
	public abstract void resize();
}

public class Rectangle extends Shape implements Resizable{
	public boolean isSquare()
    protected double getAtrea(){}
    public void resize(){}
}

ex5)

public class ClassRoom{
	private Student std;
    private ClassRoom(Student std){
    	this.std = std;
    }
}

public class Student{
	private String name;
    private int age;
}

ex6)

public class Library{
	private Book book;
    
    public Library(){
    	this.book = new Book;
    }
}

public class Book{
	private String title;
    private String author;
}

ex7)

public class Shop{
	private Projuct product;
    private Employee emp;
    
    public Shop(Projuct p){
    	this.product = p;
        this.emp = new Employee();
    }
}

public class Employee{
	private String name;
}

public class Product{
	private String pName;
    private int price;
}

ex8)

public abstract class Coffee{
	public String beans;
}

public class CafeLatte extends Coffee{
	private String temperature;
    private int price;
    
    public void drink(){
    	Option opt = new Option();
    }
}

public class Option{
	private int shot;
    private Stirng ice;
    pricate int syrup;
}

public class Cafe[
	private String name;
    private String address;
    private CafeLatte latte;
    
    public Cafe(CafeLatte latte){
    	this.latte = latte;
    }
}