在jdk 7 之前，switch 只能支持 byte、short、char、int 这几个基本数据类型和其对应的封装类型。 switch后面的括号里面只能放int类型的值，但由于byte，short，char类型，它们会 自动 转换为int类型（精精度小的向大的转化），所以它们也支持。

In Java 12 a new enhancement has been made to switch that has added new capabilities to it, which simplifies the coding by extending the old switch statement to be used as either a normal enhanced ...

JDK 7 changes this for Java by introducing the ability to switch on Strings. Specifically, Project Coin delivers on the promise of an ability to switch on Strings.

Since Java 12, you can use an enhanced switch statement that introduces two new features: the arrow syntax and the expression form. The arrow syntax allows you to write a single-line case block ...

The Java switch statement executes one statement from multiple conditions. It is like if-else-if ladder statement. The switch statement works with byte, short, int, long, enum types, String and some ...

Learn how to use statements like if, if-else, switch, for, and while to declare variables and specify expressions, make decisions, iterate over statements, and more.

switch statement expressions; and sealed classes. Java Records One knock about the Java programming language is its needless verbosity and ceremony, especially compared to other programming languages ...