- package electriccharge;
- public class Power {
- final double PRICE = 1.2;
- private double lastmonthpower;
- private double thismonthpower;
- public void setlastmonthpower(double change){
- this.lastmonthpower = change;
- }
- public double getlastmonthpower(){
- return this.lastmonthpower;
- }
- public void setthismonthpower(double change){
- this.thismonthpower = change;
- }
- public double getthismonthpower() {
- return this.thismonthpower;
- }
- public double compute(double lastmonthpower,double thismonthpower){
- return (thismonthpower-lastmonthpower)*PRICE;
- }
- }
- package electriccharge;
- public class Testpower {
- public static void main(String[] args){
- Power p1 = new Power();
- Power p2 = new Power();
- p1.setlastmonthpower(1000);
- p1.setthismonthpower(1200);
- p2.setlastmonthpower(1200);
- p2.setthismonthpower(1450);
- System.out.println("本月电费为:");
- System.out.println (p1.compute(p1.getlastmonthpower(),p1.getthismonthpower()));
- p2.setthismonthpower(1500);
- System.out.println("本月电费为:");
- System.out.println(p2.compute(p2.getlastmonthpower(),p2.getthismonthpower()));
- }
- }
第四次上机