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EnumSwitch.java
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// enumerations/EnumSwitch.java
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {NewFeature} Since JDK 14
public class EnumSwitch {
enum Signal { GREEN, YELLOW, RED, }
Signal color = Signal.RED;
public void change() {
color = switch(color) {
case RED -> Signal.GREEN;
case GREEN -> Signal.YELLOW;
case YELLOW -> Signal.RED;
};
}
}