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This article mainly explains "how to use Java Switch sentence". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use Java Switch sentences.

1. Switch statement structure

(1) definition:

The Switch statement consists of a control expression and multiple case tags, and the Switch-case statement can be converted to and from the if-else statement, but generally speaking, the Switch-case statement is more efficient. Default is executed when the current Switch cannot find a matching case, and default is not required. In general, switch statements are used to perform different actions based on different conditions.

(2) format:

(3) execute the process:

First calculate the value of the expression. Second, compared with case in turn, once there is a corresponding value, the corresponding statement will be executed, and in the process of execution, it will end when it encounters break. Finally, if all case does not match the value of the expression, the body part of the default statement is executed and the program ends.

2. Switch sentence exercises-Spring, Summer, Autumn and Winter

(1) demand: there are 12 months in a year, belonging to the four seasons of spring, summer, autumn and winter. Enter a month on the keyboard. Please use the program to determine which season the month belongs to and output.

(2) running result:

Spring: 3, 4, 5

Summer: 6, 7, 8

Autumn: 9, 10, 11

Winter: 1, 2, 12

(3) sample code:

Note: if you get case in switch and there is no corresponding break, case penetration will occur.

At this point, I believe you have a deeper understanding of "how to use Java Switch statements". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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