JAVA期末考试试卷及答案（精选）

dth:double型,表示长方形的宽度Рheight:double型,表示长方形的长度Р方法РRectangle(doublew,doubleh):构造函数РtoString():输出矩形的描述信息,如“width=1.0,height=2.0,perimeter=6.0,area=2.0”Р⑶Test类作为主类要完成测试功能Р生成Rectangle对象Р②调用对象的toString方法,输出对象的描述信息РlassTest{//主类定义2分Р publicstaticvoidmain(Stringargs[])Р { Rectangler=newRectangle(1,2);Р System.out.println(r.toString()); }Р}РinterfaceShapeArea//接口定义2分Р{ publicabstractdoublegetPerimeter();Р publicabstractdoublegetArea();Р}РclassRectangleimplementsShapeArea{Р doublewidth,height;//属性定义1分Р Р Rectangle(doublew,doubleh) //构造函数定义1分Р { width=w;height=h; }Р Р publicdoublegetPerimeter()//1分Р {return2*(width+height);}Р Р publicdoublegetArea()//1分Р {returnwidth*height;}Р Р publicStringtoString()//2分Р { return"width="+width+",height="+height+Р ",perimeter="+getPerimeter()+",area="+getArea();Р }Р}