[6주차 실습] 4월 6일 Problem Set

1.The following code is the main method we want to run, and the following result is the corresponding console output. Declare the Rectangle class for this main method.

package April06;

public class Project01 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Rectangle r=new Rectangle(2,2,8,7);
		Rectangle s=new Rectangle(5,5,6,6);
		Rectangle t=new Rectangle(1,1,10,10);
		
		r.show();
		System.out.println("Area of s is "+s.square());
		if(t.contains(r))System.out.println("t contains r.");
		if(t.contains(s))System.out.println("t contains s.");
	}

}

package April06;

public class Rectangle {
	private int width, height;
	private int xpos, ypos;
	
	
	Rectangle(int xpos, int ypos, int width, int height){
		this.width=width;
		this.height=height;
		this.xpos=xpos;
		this.ypos=ypos;
		
	}
	void show(){
		System.out.printf("A rectangle with %dx%d at (%d, %d)\n", this.width, this.height, this.xpos, this.ypos);
	}
	
	int square() {
		return (width*height);
	}
	
	boolean contains(Rectangle r) {
	      if(this.xpos < r.xpos && this.ypos < r.ypos)
	         if((this.width+this.xpos) > (r.xpos+r.width) && (this.height+this.ypos) > (r.ypos+r.height))
	            return true;
	      return false;
	}
	
}

<실행결과>

 

2. The class Day, which represents a day’s to-do list, is as follows. Write a class MonthSchedule to represent a month’s to-do. Create an array of Day objects, a constructor, and the input(), view(), finish(), and run() methods in the MonthSchedule class, and the main function performs only these two commands.

• MonthSchedule april = new MonthSchedule(30);

• april.run();

package April06;

public class Project02 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		MonthSchedule april=new MonthSchedule(30);
		april.run();
	}

}

package April06;

public class Day {
	String work;
	void set(String work) {
		this.work=work;
	}
	String get() {
		return work;
	}
	void show() {
		if(work==null)
			System.out.println("Nothing.");
		else
			System.out.print("There is ["+work+"]");
	}
}

package April06;
import java.util.*;

public class MonthSchedule {
	Scanner sc=new Scanner(System.in);
	Day date[];
	
	
	void input(){
		System.out.print("Date(1-30)? ");
		int day=sc.nextInt();
		System.out.print("Do list (without space)?");
		String stuff=sc.next();
		day--;
		date[day].set(stuff);
	}
	void view() {
		System.out.print("Date(1-30)? ");
		int day=sc.nextInt();
		day--;
		date[day].show();
		System.out.println("on the "+(day+1)+"th.");
	}
	void finish() {
		System.out.print("This is the end of the program.");
	}
	
	
	
	void run() {
		System.out.println("This is a schedule management program for this month.");
		while(true) {
			System.out.print("Command (Insert: 1, Show: 2, Quit: 3)  >>>");
			int num=sc.nextInt();
			if(num==1) {
				input();
			}
			else if(num==2) {
				view();
			}
			else {
				finish();
				break;
			}
		}
	}
	
	MonthSchedule(int day) {
	      this.date = new Day[day];
	      for(int i=0; i<date.length; i++) {
	         date[i] = new Day();
	      }
	}
}

<실행결과>