lamda

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@FunctionalInterface     //函数式接口
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interface IMessage{
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  public void send(String str);
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}
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public class Lamda {
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  public static void main(String args []){
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    IMessage msg = (str)->{
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      System.out.println("发送消息"+ str);
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    };
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    msg.send("我在这呢");
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  }
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}