How to find the midpoint of a line in Java?

Assume (x1, y1) is the starting point of the line and (x2, y2) is the end point of the line.

To get the midpoint of a straight line, we must use the midpoint formula of a straight line.

Midpoint = ((x1+x2)/2 , (y1+y2)/2)

In this article, we will see how to find the midpoint of a line segment using Java programming language, when the two points of the line segment are known.

Show you some examples

Example 1

Suppose these two points are (2,3) and (3,5)

By using the midpoint formula of a line segment,

a = (x1+x2)/2 = (2+3)/2 = 2.5
b = (y1+y2)/2 = (3+5)/2 = 4.0

Therefore, the midpoint of the straight line is (2.5, 4.0)

Example 2

Suppose these two points are (2,-3) and (-3,5)

By using the midpoint formula of a line segment,

a = (x1+x2)/2 = (2+(-3)/2 = -0.5
b = (y1+y2)/2 = ((-3) +5)/2 = 1.0

Therefore, the midpoint of the line segment is (-0.5, 1.0)

Example 3

Suppose these two points are (2,2) and (5,5)

By using the midpoint formula of a line segment,

a = (x1+x2)/2 = (2+5)/2 = 3.5
b = (y1+y2)/2 = (2+5)/2 = 3.5

Therefore, the midpoint of the line segment is (3.5, 3.5)

algorithm

• Step 1 - Get the start and end points of the line via static input or user input.

• Step 2 - Then find the midpoint by using the midpoint formula of the line segment.

• Step 3 - Print the results.

Multiple methods

We have provided solutions in different ways.

• By using static input values

• By using user-defined methods

Let’s look at the program and its output one by one.

Method 1: Using static input values

In this method, the start and end points of the line will be initialized in the program. Then use the algorithm to find the thinking point.

The Chinese translation of

Example

is:

Example

public class Main{
   //main method
   public static void main(String[] args){
   
      //declared start point of line
      double x1 = -3;
      double y1 = 4;
      System.out.println("Start point of the line: "+x1+", "+y1);
      
      //Declared end point of line
      double x2 = -2;
      double y2 = 5;
      System.out.println("End point of the line: "+x2+", "+y2);
      
      //Find midpoint
      double x=(x1+x2)/2;
      double y=(y1+y2)/2;
      System.out.println("Mid Point = "+x+" , "+y);
   }   
}

Output

Start point of the line: -3.0, 4.0
End point of the line: -2.0, 5.0
Mid Point = -2.5 , 4.5

Method 2: Use user definition

In this method, the start and end points of the line will be initialized in the program. The user defined method is then called by passing these points as parameters and inside the method an algorithm is used to find the midpoint.

The Chinese translation of

Example

is:

Example

public class Main{
   //main method
   public static void main(String[] args){
   
      //declared start point of line
      double x1 = 2;
      double y1 = 2;
      System.out.println("Start point of the line: "+x1+", "+y1);
      
      //Declared end point of line
      double x2 = 7;
      double y2 = 9;
      System.out.println("End point of the line: "+x2+", "+y2);

      //call user defined method to find midpoint
      findMidpoint(x1,y1,x2,y2);
   }
   //user defined method
   public static void findMidpoint(double x1,double y1,double x2,double y2){
      //Find midpoint
      double x=(x1+x2)/2;
      double y=(y1+y2)/2;
      System.out.println("Mid Point = "+x+" , "+y);
   }
}

Output

Start point of the line: 2.0, 2.0
End point of the line: 7.0, 9.0
Mid Point = 4.5 , 5.5

In this article, we explored how to find the midpoint of a straight line in Java using different methods.

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