(51CTO official Java development engineer QQ group (27163376), please enter your ID for verification User interface components and design, event management and window structure components, basic knowledge of JFC/Swing and Swing series components, through simple text editor examples, simple browser examples, Go program examples, Java development clock examples, Tetris examples and letter typing The practice example introduces in detail how to use the Java language to build a graphical user interface program. The language of this book is easy to understand, rich in content, and strong in practicability. It can be used as a study and reference book for relevant majors in various technical secondary schools and Java training classes, and can also be used as a reference book for related technical personnel and self-study.)