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I started from the source code of those methods in the class. The GridLayout2 class inherits from and then redefines the public methods preferredLayoutSize(), minimumLayoutSize(), and layoutContainer() to account for multisized grid cells. A thread only executes a synchronized method after it has acquired the lock for the methods object or class. The GridLayout2 extension is fairly simple. Java Interview Questions - Question: What are synchronized methods and synchronized statements Answer: Synchronized methods are methods that are used to control access to an object. Note: If you use a JTable to display information in a matrix, then check out " Java Tip 116: Set Your Table Options - at Runtime!" Sonal Goyal with John D. D:SWING>javac comtutorialspointguiSwingLayoutDemo.java. Go to D:/ > SWING and type the following command. Compile the program using the command prompt. In this tip, I extend GridLayout to create cells of unequal size. Create the following Java program using any editor of your choice in say D:/ > SWING > com > tutorialspoint > gui >. It can help you write short and readable code while laying out components in equally sized cells. However, the GridLayout layout manager seems more appropriate. In those cases, you have to use the GridBagLayout class, whose numerous GridBagConstraints settings cause your code to grow quickly. Those layout cells are unequal in order to minimize the space occupied by the laid out components. Developers often need to create graphical user interfaces (GUIs) that have a matrix-type layout with columns of different widths or rows of different heights.