Code in JAVA SWING
 

You are to build a Java app for a specialised calculator. The interactivity of this calculator is through a Java GUI. The calculator should resemble the features of a proper calculator and one could use it to: 1. To check if the dimensions of a particular three-sided figure are of a right-angled triangle or not. Then, it should also be able to compute the area of the triangle and all the angles of that triangle. Note: The precision of the result would need to be specified by the user (e.g. how many decimal points). 2. Solve a pair of simultaneous equation. 3. Compute the gradient of a line or a curve at a given point. 4. Solve the Inter-quartile range for a non-grouped data.