50 lines
1.0 KiB
Java
50 lines
1.0 KiB
Java
// innerclasses/LambdaExpressions.java
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// ©2015 MindView LLC: see Copyright.txt
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import static com.mindviewinc.util.Print.*;
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interface Description {
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String brief();
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}
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interface Body {
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String detailed(String head);
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}
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interface Multi {
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String twoArg(String head, Double d);
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}
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public class LambdaExpressions {
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Description desc = new Description() {
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@Override
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public String brief() {
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return "Short info";
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}
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};
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Description desc2 = () -> "Short info";
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Body bod = (h) -> h + " More details";
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Body bod2 = h -> h + " No Parens!";
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Multi mult = (h, n) -> h + n;
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// Parens are required with multiple args:
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// Multi mult2 = h, n -> h + n; // Nope
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public static void main(String[] args) {
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LambdaExpressions le =
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new LambdaExpressions();
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print(le.desc.brief());
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print(le.desc2.brief());
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print(le.bod.detailed("Hi!"));
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print(le.bod2.detailed("Oh!"));
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print(le.mult.twoArg("Pi! ", 3.14159));
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}
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}
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/* Output:
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Short info
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Short info
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Hi! More details
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Oh! No Parens!
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Pi! 3.14159
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*/
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