37 lines
976 B
Java
37 lines
976 B
Java
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// enumerations/Planets.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// {NewFeature} Since JDK 14
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enum CelestialBody {
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MERCURY, VENUS, EARTH, MARS, JUPITER,
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SATURN, URANUS, NEPTUNE, PLUTO
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}
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public class Planets {
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public static String classify(CelestialBody b) {
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var result = switch(b) {
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case MERCURY, VENUS, EARTH,
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MARS, JUPITER,
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SATURN, URANUS, NEPTUNE -> {
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System.out.print("A planet: ");
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yield b.toString();
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}
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case PLUTO -> {
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System.out.print("Not a planet: ");
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yield b.toString();
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}
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};
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return result;
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}
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public static void main(String[] args) {
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System.out.println(classify(CelestialBody.MARS));
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System.out.println(classify(CelestialBody.PLUTO));
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}
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}
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/* Output:
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A planet: MARS
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Not a planet: PLUTO
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*/
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