Java实验4A：一、数组与字符串 1、随机生成一个10个元素组成一维数组，输出数组中的最大值、最小值、所有元素总和，以及最大值...

package part2; public class TriangleLadderCircle { // 三角形类 class Triangle { private double side1; private double side2; private double side3; private double perimeter; private double area; private boolean isTriangle; public Triangle(double side1, double side2, double side3) { this.side1 = side1; this.side2 = side2; this.side3 = side3; this.perimeter = side1 + side2 + side3; this.isTriangle = isValidTriangle(side1, side2, side3); if (this.isTriangle) { this.area = Math.sqrt((perimeter / 2) * (perimeter / 2 - side1) * (perimeter / 2 - side2) * (perimeter / 2 - side3)); } else { this.area = 0; } } public double getPerimeter() { return perimeter; } public double getArea() { return area; } public boolean isValidTriangle(double a, double b, double c) { return a + b > c && a + c > b && b + c > a; } public void setSides(double side1, double side2, double side3) { this.side1 = side1; this.side2 = side2; this.side3 = side3; this.perimeter = side1 + side2 + side3; this.isTriangle = isValidTriangle(side1, side2, side3); if (this.isTriangle) { this.area = Math.sqrt((perimeter / 2) * (perimeter / 2 - side1) * (perimeter / 2 - side2) * (perimeter / 2 - side3)); } else { this.area = 0; } } } // 梯形类 class Ladder { private double upperBase; private double lowerBase; private double height; private double area; public Ladder(double upperBase, double lowerBase, double height) { this.upperBase = upperBase; this.lowerBase = lowerBase; this.height = height; this.area = (upperBase + lowerBase) * height / 2; } public double getArea() { return area; } } // 圆形类 class Circle { private double radius; private double circumference; private double area; public Circle(double radius) { this.radius = radius; this.circumference = 2 * Math.PI * radius; this.area = Math.PI * radius * radius; } public double getCircumference() { return circumference; } public double getArea() { return area; } } // 主类 public static void main(String[] args) { TriangleLadderCircle tlc=new TriangleLadderCircle(); // 创建三角形对象 Triangle triangle = tlc.new Triangle(3.0, 4.0, 5.0); System.out.println("Triangle Perimeter: " + triangle.getPerimeter()); System.out.println("Triangle Area: " + triangle.getArea()); triangle.setSides(6,8,10); System.out.println("Changed Triangle Perimeter: " + triangle.getPerimeter()); System.out.println("Changed Triangle Area: " + triangle.getArea()); // 创建梯形对象 Ladder ladder =tlc. new Ladder(4.0, 6.0, 3.0); System.out.println("Ladder Area: " + ladder.getArea()); // 创建圆形对象 Circle circle =tlc. new Circle(7.0); System.out.println("Circle Circumference: " + circle.getCircumference()); System.out.println("Circle Area: " + circle.getArea()); } }