java xy轴计算三角形面积

package com.text.util; import java.util.Scanner; public class Text { public static void main(String[] args) { Scanner in=new Scanner(System.in); System.out.print("请输入xa的值"); int xa=in.nextInt(); System.out.print("请输入ya的值"); int ya=in.nextInt(); System.out.print("请输入xb的值"); int xb=in.nextInt(); System.out.print("请输入yb的值"); int yb=in.nextInt(); double c=Math.sqrt(xa-xb)*(xa-xb)+(ya-yb)*(ya-yb); System.out.print(String.format("%.3f",c)); } }