# Java Program To Find Area Of Triangle ~ foundjava

### Java Program to Calculate Area of Triangle

In this java tutorial, We are going to learn java program to find area of triangle with 3 different-different ways with simple examples.

There are many method to calculate area of triangle in java programs but here we will see only 3 useful method step-by-step with quite easy examples.

Let's see java program for area of triangle.

### 1) Area of Triangle in Java with Example 1

This is the first area of triangle program in java where we will calculate the area of triangle by using area of a triangle formula.

Area of triangle formula is = base * height/2

Let's know the area of triangle through java program by using above formula.

class Demo1
{
public static void main(String args[])
{
double base, height, area;

base = 20.7;//suppose base of triangle is 20.7
height = 15.3;//suppose height of triangle is 15.3

area = base * height/2;
System.out.println("Area of Triangle is : "+area);
}
}

Output: Area of Triangle is : 158.355

Let's take another simple program to find area of triangle in java where we will use Scanner class to take input to the user from the keyboard.

### 2) Area of Triangle in Java with Example 2

This is simple java program to get the area of triangle where we will take the value of base width and height of triangle from the user.

import java.util.Scanner;
class Demo2
{
public static void main(String args[])
{
//create scanner class object
Scanner sc = new Scanner(System.in);

System.out.println("Enter the base of triangle");
double b = sc.nextDouble();

System.out.println("Enter the height of triangle");
double h = sc.nextDouble();

double area = b * h/2;
System.out.println("Area of triangle is : "+area);
}
}

Output: Enter the base of triangle
48.6
Enter the height of triangle
50.2
Area of triangle is : 1219.8600000000001

Now we are going to take final example of our area of triangle java program.

### 3) Area of Triangle in Java with Example 3

This is simple java program to find area of triangle using constructor and scanner class.

import java.util.Scanner;
class AreaOfTriangle
{
double area;
AreaOfTriangle(double base, double height)//Constructor declaration
{
area = base * height/2;
System.out.println("Area of Triangle is : "+area);
}
}

class Test
{
public static void main(String args[])
{
//creating Scanner class
Scanner sc = new Scanner(System.in);

System.out.println("Enter base of triangle");
double base = sc.nextDouble();

System.out.println("Enter height of triangle");
double height = sc.nextDouble();

//creating object of AreaOfTriangle class
AreaOfTriangle a = new AreaOfTriangle(base, height);
}
}

Output: Enter base of triangle
5
Enter height of triangle
6
Area of triangle is : 15.0

Here we have discussed, How to calculate area of triangle through java programs with difference - different methods e.g through constructor, Scanner class, etc.

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