1.
package Class;
public class Class1 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Point p1 = new Point(1,2);
p1.movePoint(1,2);
Point p2 = new Point(4,6);
p2.movePoint(4,6);
}
}
class Point{
int x;int y;
public Point() {
}
public Point(int x0, int y0) {
super();
this.x = x;
this.y = y;
}
void movePoint(int x0, int y0) {
x = x0+1;
y = y0+5;
System.out.println("p1的坐标是："+x+","+y);
System.out.println("p2的坐标是："+x+","+y);
}
}
2.
package Class;
public class Class1 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Rectangle r1 = new Rectangle(7,5);
r1.getArea();
r1.getPer();
r1.showAll();
}
}
class Rectangle{
int length;int width;
public Rectangle(int length, int width) {
super();
this.length = length;
this.width = width;
}
void getArea() {
int Area;
Area = length*width;
System.out.println("面积是："+Area);
}
void getPer() {
int Per;
Per = 2*(length+width);
System.out.println("周长是："+Per);
}
void showAll() {
System.out.println("长是："+length);
System.out.println("宽是："+width);
int Area;
Area = length*width;
System.out.println("面积是："+Area);
int Per;
Per = 2*(length+width);
System.out.println("周长是："+Per);
}
}
3.
package Class;
public class Class1 {
public static void main(String[] args) {
// TODO Auto-generated method stub
Notebook n1 = new Notebook(‘b‘,5);
n1.showAll();
}
}
class Notebook{
char color;int cpu;
public Notebook(char color, int cpu) {
super();
this.color = color;
this.cpu = cpu;
}
public Notebook() {
}
void showAll() {
System.out.println("颜色："+color);
System.out.println("型号："+cpu);
}
}
原文：https://www.cnblogs.com/ldp123/p/14801365.html