java计算圆的面积周长?我们一起去了解并探讨一下这个问题吧!
java计算圆的面积周长?import java.util.Scanner;public class TestCircle {public static void main(String[] args) {Scanner s = new Scanner(System.in);Circle c = new Circle();System.out.print("请输入圆半径：");c.radius = s.nextDouble();System.out.println("圆半径为：" c.getRadius());System.out.println("圆周长为：" c.findGirth());System.out.println("圆面积为：" c.findArea());}}class Circle{double radius;//半径public double findGirth() {//计算周长return 3.14*radius*2;}public double findArea() {//计算面积return 3.14*radius*radius;}public double getRadius() {return radius;}public void setRadius(double radius) {this.radius = radius;}}，下面我们就来说一说关于java计算圆的面积周长?我们一起去了解并探讨一下这个问题吧!
java计算圆的面积周长
求圆的周长、面积import java.util.Scanner;public class TestCircle {public static void main(String[] args) {Scanner s = new Scanner(System.in);Circle c = new Circle();System.out.print("请输入圆半径：");c.radius = s.nextDouble();System.out.println("圆半径为：" c.getRadius());System.out.println("圆周长为：" c.findGirth());System.out.println("圆面积为：" c.findArea());}}class Circle{double radius;//半径public double findGirth() {//计算周长return 3.14*radius*2;}public double findArea() {//计算面积return 3.14*radius*radius;}public double getRadius() {return radius;}public void setRadius(double radius) {this.radius = radius;}}
/* * 现在已知数组int[] arr = {12,34,465,3,45}; * 将最大值和最小值的位置进行交换 */public class Test { public static void main(String[] args) {int[] arr = {12,34,456,3,45};System.out.print("arr[]:");for(int i = 0; i<arr.length; i) {System.out.print(arr[i] " ");}System.out.println();//max,minint maxIndex = 0;int minIndex = 0;for(int i = 1; i<arr.length; i) {if(arr[maxIndex] < arr[i]) {maxIndex = i;}if(arr[minIndex] > arr[i]) {minIndex = i;}}System.out.println("maxIndex:" maxIndex " " "minIndex:" minIndex);int a = arr[maxIndex];arr[maxIndex] = arr[minIndex];arr[minIndex] = a;//System.out.print("交换后arr[]:");for(int i = 0; i<arr.length; i) {System.out.print(arr[i] " ");}System.out.println(); } }
运行结果
arr[]:12 34 456 3 45 maxIndex:2 minIndex:3交换后arr[]:12 34 3 456 45
