package com.homework12;
public class Point {
int x;
int y;
public Point() {
}
public Point(int x, int y) {
this.x = x;
this.y = y;
}
public void movePoint(int dx, int dy){
x += dx;
y += dy;
}
public void show(){
System.out.print("X = " + x);
System.out.println("\tY = " + y);
}
}
package com.homework12;
public class P1 {
public static void main(String[] args) {
Point p1 = new Point();
Point p2 = new Point(2, 3);
p1.x = 1;
p1.y = 2;
p1.show();
p2.show();
System.out.println("-----移动后-----");
p1.movePoint(4, 5);
p2.movePoint(0, 2);
p1.show();
p2.show();
}
}
package com.homework12;
public class Rectangle {
int length;
int width;
public double getArea(){ //面积
return length * width;
}
public double getPer(){ //周长
return 2*(length + width);
}
public void showAll(){ //全输出
System.out.println("length = " + length);
System.out.println("width = " + width);
System.out.println("area = " + getArea());
System.out.println("per = " + getPer());
}
public Rectangle(int length, int width) {
this.length = length;
this.width = width;
}
}
package com.homework12;
public class p2 {
public static void main(String[] args) {
Rectangle p = new Rectangle(5, 3);
p.showAll();
}
}
package com.homework12;
public class laptop {
public laptop() {
}
public laptop(char clour, int cpu) {
this.clour = clour;
this.cpu = cpu;
}
char clour;
int cpu;
public void show(){
System.out.println("clour = " + clour);
System.out.println("cpu = " + cpu);
}
}
package com.homework12;
public class Test {
public static void main(String[] args) {
laptop p1 = new laptop();
p1.clour = '白';
p1.cpu = 10002;
laptop p2 = new laptop('黑', 10003);
p1.show();
p2.show();
}
}
