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import java.util.function.Consumer; public class LambdaDemo3 { public static void main(String[] args) { // 單參數(shù)無(wú)返回值 Consumer<String> consumer1 = new Consumer<String>() { @Override public void accept(String s) { System.out.println(s); } }; consumer1.accept("Hello World!"); Consumer<String> consumer2 = (String s) -> { System.out.println(s); }; consumer2.accept("你好，世界！"); } }