字节码分析-方法引用

package java.bytecode;

import java.util.ArrayList;
import java.util.List;

/**
 * 方法引用示例 - 演示Java 8方法引用
 */
public class MethodReferenceExample {

    // 静态方法引用示例
    public void staticMethodReferenceExample() {
        List<String> list = new ArrayList<>();
        list.add("A");
        list.add("B");
        list.forEach(System.out::println);
    }

    // 实例方法引用示例
    public void instanceMethodReferenceExample() {
        List<String> list = new ArrayList<>();
        list.add("hello");
        list.add("world");
        list.forEach(String::toUpperCase);
    }

    // 构造方法引用示例
    public void constructorReferenceExample() {
        List<String> list = new ArrayList<>();
        list.add("1");
        list.add("2");
        list.stream()
            .map(Integer::new)
            .forEach(System.out::println);
    }
}

  public void staticMethodReferenceExample();
    Code:
        26: aload_1
        27: getstatic     #20                 // Field java/lang/System.out:Ljava/io/PrintStream;
        30: dup
        31: invokestatic  #26                 // Method java/util/Objects.requireNonNull:(Ljava/lang/Object;)Ljava/lang/Object;
        34: pop
        35: invokedynamic #32,  0             // InvokeDynamic #0:accept:(Ljava/io/PrintStream;)Ljava/util/function/Consumer;
        40: invokeinterface #36,  2           // InterfaceMethod java/util/List.forEach:(Ljava/util/function/Consumer;)V

BootstrapMethods:
  0: #107 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(...)
    Method arguments:
      #77 (Ljava/lang/Object;)V
      #79 invokevirtual java/io/PrintStream.println:(Ljava/lang/String;)V
      #86 (Ljava/lang/String;)V
  1: #107 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(...)
    Method arguments:
      #77 (Ljava/lang/Object;)V
      #87 invokevirtual java/lang/String.toUpperCase:()Ljava/lang/String;
      #86 (Ljava/lang/String;)V
  2: #107 invokestatic java/lang/invoke/LambdaMetafactory.metafactory:(...)
    Method arguments:
      #94 (Ljava/lang/Object;)Ljava/lang/Object;
      #95 newinvokespecial java/lang/Integer."<init>":(Ljava/lang/String;)V
      #100 (Ljava/lang/String;)Ljava/lang/Integer;

#79 invokevirtual java/io/PrintStream.println:(Ljava/lang/String;)V

#87 invokevirtual java/lang/String.toUpperCase:()Ljava/lang/String;

#95 newinvokespecial java/lang/Integer."<init>":(Ljava/lang/String;)V