15 C2. Analyze the following Java class and complete the missing code based on the comments in the program Area X import javafx. application. Application: import javax. stage. Stage; import javax.scene. Scene: import javafx.scene. layout. GridPane; Length 7 import javatx.geometry.Pos: Area 49.0 import javatx.geometry.Pos; import javax.scene.control.Label: Compute Area import javafx.scene.control. TextField; import javax.scene.control.Button: [1 mark) // (1) Complete the class header. public class SquareArea @Override // (2) Complete the method header. public void // (3) Create a GridPane object called gridPane. [1 mark] [1 mark) 1/ (4) Create and add a label object with the value "Length" to the grid pane. [1 mark)