First, let’s take a look at the elements of the form. Take [Notepad] under Windows as an example: When we create a new Notepad, we will see the title, size, position, Closing method
#So we use code to create a form, which also requires these elements. Prerequisite: To create a form in Java, we need to inherit the [JFrame] class and import JFrame Package
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The second step is to set the title for the form (PS: For some settings of the form, it is best to write them in the construction method to develop good habits). To set the title, use the setTitle() method
The third step is to give the window To set the size and position of the body, we can use setBounds() [setBounds() passes in 4 parameters, the first two are the position of the form, and the last two are the size of the form] to set the size and position together, or you can Use setLocation() to set the position of the form, and use setSize() to set the size of the form
Note: The position of the form is a coordinate system with the upper left corner of the computer screen as the origin (0, 0)
The fourth step is to set the closing method of the form, using setDefaultCloseOperation()
The last step is also particularly important , although we have created the form above, we have not set the form to [display], so if you run the program now, the form will not be displayed. We also need to add setVisible(), and the passed-in parameters are true;
We complete the program and add the main() method, complete!
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