java实验四——测试梯形类

package hello;

public class TestTixing {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Tixing t1=new Tixing(10,20,10);
        System.out.println(t1.upper+" "+t1.lower+" "+t1.high);
        System.out.println(t1.getArea());
        System.out.println(t1.toString());
        t1.setHigh(100);
        System.out.println(t1.toString());
        Tixing t2=new Tixing(20,40,20);
        System.out.println(t2.toString());
        t2=t1;
        System.out.println(t2.toString());
        System.out.println(t1.toString());
        t1.setHigh(50);
        System.out.println(t2.toString());
        System.out.println(t1.toString());
    }

}
class Tixing {

    double upper,lower,high;

    public Tixing() {
    }

    public Tixing(double upper, double lower, double high) {
        this.upper = upper;
        this.lower = lower;
        this.high = high;
    }

    public double getUpper() {
        return upper;
    }

    public void setUpper(double upper) {
        this.upper = upper;
    }

    public double getLower() {
        return lower;
    }

    public void setLower(double lower) {
        this.lower = lower;
    }

    public double getHigh() {
        return high;
    }

    public void setHigh(double high) {
        this.high = high;
    }

    public double getArea(){
        return (upper+lower)*high/2;
    }

    public String toString() {
        return "Tixing [upper=" + upper + ", lower=" + lower + ", high=" + high    + "]";
    }

}