Java 实例计算三角面积

来源：这里教程网时间：2026-02-17 20:17:11 作者：

在这里，我们将看到如何计算三角形的面积。我们将看到以下两个程序：

1）程序 1：提示用户输入三角形的基本宽度和高度。

2）程序 2：无用户交互：程序本身指定了宽度和高度。

计划 1：

/** * @author: BeginnersBook.com * @description: Program to Calculate area of Triangle in Java * with user interaction. Program will prompt user to enter the  * base width and height of the triangle. */import java.util.Scanner;class AreaTriangleDemo {   public static void main(String args[]) {         Scanner scanner = new Scanner(System.in);      System.out.println("Enter the width of the Triangle:");      double base = scanner.nextDouble();      System.out.println("Enter the height of the Triangle:");      double height = scanner.nextDouble();      //Area = (width*height)/2      double area = (base* height)/2;      System.out.println("Area of Triangle is: " + area);         }}

输出：

Enter the width of the Triangle:2Enter the height of the Triangle:2Area of Triangle is: 2.0

计划 2：

/** * @author: BeginnersBook.com * @description: Program to Calculate area of Triangle * with no user interaction. */class AreaTriangleDemo2 {   public static void main(String args[]) {         double base = 20.0;      double height = 110.5;      double area = (base* height)/2;      System.out.println("Area of Triangle is: " + area);          }}

输出：