can someone help me understand this language for java programming language

Write a program called "GenerateShape" for the following picture on a drawing panel. (20 points) Figure properties: (1) Drawing panel size: 200*200; (2) Top left figure: (x,y) position is (0,0); size is 50*50; (3) Bottom right figure: (x,y) position is (100,100); size is 100*100