Test.java文件内容如下
class Circle{
private double r
private String color
public Circle(double r){
this.r=r
}
public double area(){
return Math.PI*r*r
}
public double perimeter(){
return Math.PI*2*r
}
public double getR(){
return this.r
}
public void setR(double r){
this.r=r
}
public String getColor(){
return this.color
}
public void setColor(String color){
this.color=color
}
public String toString(){
return "圆的半径为"+r+",颜色为"+color
}
}
class Cone{
private Circle c
private double h
private String color
public Cone(Circle c,double h){
this.c=c
this.h=h
}
public double volume(){
return 1.0/3*c.area()*h
}
public Circle getCircle(){
return this.c
}
public void setCircle(Circle c){
this.c=c
}
public double getH(){
return this.h
}
public void setH(double h){
this.h=h
}
public String getColor(){
return this.color
}
public void setColor(String color){
this.color=color
}
public String toString(){
return "圆锥的底面积为"+c.area()+",高为"+h+",颜色为"+color
}
}
public class Test{
public static void main(String[] args){
Circle circle1=new Circle(2.5)
circle1.setColor("红色")
System.out.println(circle1.toString())
System.out.println("圆的面积为"+circle1.area())
System.out.println("圆的周长为"+circle1.perimeter())
Cone circlar1=new Cone(circle1,2.7)
circlar1.setColor("蓝色")
System.out.println(circlar1.toString())
System.out.println("圆锥的体积为"+circlar1.volume())
}
}
但凡多翻下书。。。
ThreadA.java:
public class ThreadA extends Thread {
@Override
public void run() {
System.out.println("I am XXX")
}
}
ThreadB.java:
public class ThreadB extends Thread {
@Override
public void run() {
System.out.println("I love XXX")
}
}
Main.java:
public class Main {
public static void main(String[] args) {
ThreadA threadA = new ThreadA()
ThreadB threadB = new ThreadB()
threadA.start()
threadB.start()
}
}
运行结果: