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java lambda 原理分析

LocalVariableTypeTable #27 = Utf8 Ljava/util/ArrayListLjava/lang/String;>; #28 = Utf8...:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke...;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle.../lang/String; 23 10 1 list Ljava/util/ArrayList; LocalVariableTypeTable:.../lang/String;)V #47 (Ljava/lang/String;)V ?

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《Kotlin 程序设计》第四章 Kotlin 语法基础

/lang/String;)V @Lorg/jetbrains/annotations/NotNull;() // invisible, parameter 0 ACONST_NULL...tmp0_safe_receiver Ljava/lang/String; L1 L3 2 LOCALVARIABLE tmp1_safe_receiver Ljava/lang/String...static testNullSafeOperator(Ljava/lang/String;)V @Lorg/jetbrains/annotations/Nullable;() // invisible.../lang/Object;)Ljava/lang/String; @Lorg/jetbrains/annotations/NotNull;() // invisible @Lorg/jetbrains...: Collection, separator: String, prefix: String, postfix: String ): String

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IDEA插件ASM Bytecode Outline

/lang/String; tableName @Lorg/jetbrains/annotations/NotNull;() // invisible // access flags 0x12...// signature Ljava/util/List; // declaration: java.util.List... private final Ljava/util/List; columns @Lorg/jetbrains.../annotations/NotNull;() // invisible // access flags 0x11 public final getTableName()Ljava/lang/...GETFIELD com/itoolshub/pojo/model/table/TableModel.tableName : Ljava/lang/String; ARETURN L1

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《Kotlin 程序设计》第九章 Kotlin与Java混合调用

(Ljava/lang/String;)V NEW java/util/Date DUP INVOKESPECIAL java/util/Date.... ()V INVOKEVIRTUAL java/text/SimpleDateFormat.format (Ljava/util/Date;)Ljava/lang/String;... ()V INVOKEVIRTUAL java/util/Date.toString ()Ljava/lang/String; INVOKEINTERFACE java/util..., int) public final static swap(Ljava/util/List;II)V @Lorg/jetbrains/annotations/NotNull;() // invisible.../lang/Object;Ljava/lang/String;)V L1 LINENUMBER 6 L1 ALOAD 0 ILOAD 1 INVOKEINTERFACE java/util/List.get

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JavaAgent+ASM字节码插桩采集方法名称以及入参和出参结果并记录方法耗时

;Ljava/lang/String;IJ[I[[Ljava/lang/Object;Lorg/itstack/test/Req;)Ljava/lang/String; 对于这样的字符串内容需要使用到正则表达式进行解析...正则解析方法描述 @Test public void test_desc() { String desc = "(Ljava/lang/String;Ljava/lang/Object;Ljava.../lang/String;IJ[I[[Ljava/lang/Object;Lorg/itstack/test/Req;)Ljava/lang/String;"; Matcher m = Pattern.compile...; Ljava/lang/String; I J [I [[Ljava/lang/Object; Lorg/itstack/test/Req; Process finished with exit code...(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;", false); } else if ("D".equals(type

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ASM字节码编程 | JavaAgent+ASM字节码插桩采集方法名称以及入参和出参结果并记录方法耗时

;Ljava/lang/String;IJ[I[[Ljava/lang/Object;Lorg/itstack/test/Req;)Ljava/lang/String; 对于这样的字符串内容需要使用到正则表达式进行解析...❝正则解析方法描述 ❞ @Test public void test_desc() { String desc = "(Ljava/lang/String;Ljava/lang/Object;Ljava.../lang/String;IJ[I[[Ljava/lang/Object;Lorg/itstack/test/Req;)Ljava/lang/String;"; Matcher m = Pattern.compile.../Object; Ljava/lang/String; I J [I [[Ljava/lang/Object; Lorg/itstack/test/Req; Process finished with...(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;", false); } else if ("D".equals(type

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错误信息：java.lang.AbstractMethodError

(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud.../client/ServiceInstance; 错误信息详细如下： org.springframework.web.util.NestedServletException: Handler dispatch...(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud...java.lang.Thread.run(Thread.java:844) Caused by: java.lang.AbstractMethodError: org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose...(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud

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原荐 JVM笔记整理

FGCT: Full garbage collection time. GCT: Total garbage collection time....31563088 [C 3: 32929 19770080 [I 4: 302030 7248720 java.lang.String...5: 61139 6692992 java.lang.Class 6: 90152 6592144 [Ljava.lang.Object...$Node 11: 8922 1496016 [J 12: 9889 1468048 [Ljava.util.HashMap$...[Ljava.util.concurrent.ConcurrentHashMap$Node; 29: 11516 460640 com.intellij.openapi.extensions.impl.ExtensionComponentAdapter

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研究学习Kotlin的一些方法

/lang/String;)V @Lorg/jetbrains/annotations/Nullable;() // invisible, parameter 0 L0 LINENUMBER...//对string字符串判空 INVOKESTATIC kotlin/text/StringsKt.toCharArray (Ljava/lang/String;)[C DUP.../Observer { // access flags 0x11 public final update(Ljava/util/Observable;Ljava/lang/Object;).../StringBuilder; LDC " " INVOKEVIRTUAL java/lang/StringBuilder.append (Ljava/lang/String;)Ljava...)Ljava/lang/StringBuilder; INVOKEVIRTUAL java/lang/StringBuilder.toString ()Ljava/lang/String;

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The calling method‘s class, org.redisson.spring.data.connection.RedissonConnection

(Ljava/lang/String;Ljava/lang/String;Lorg/redisson/client/protocol/Decoder;)V The calling method's...(Ljava/lang/String;Ljava/lang/String;Lorg/redisson/client/protocol/Decoder;)V。

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Kotlin 类扩展实现原理

/lang/Object;Ljava/lang/String;)V L1 LINENUMBER 16 L1 LDC "Father call eat()" ASTORE 1...L2 ICONST_0 ISTORE 2 L3 GETSTATIC java/lang/System.out : Ljava/io/PrintStream;...ALOAD 1 INVOKEVIRTUAL java/io/PrintStream.println (Ljava/lang/Object;)V L4 L5 LINENUMBER.../lang/Object;Ljava/lang/String;)V L1 LINENUMBER 18 L1 LDC "Son call eat()" ASTORE 1.../lang/String;)V INVOKESTATIC test/Test16Kt.main ()V RETURN // 省略部分无关的实现 // compiled from

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Java与Scala如何编译Lambda表达式？

Object // 在合成类中调用另一个apply()方法 invokevirtual myLambdas/Lambda1$$anonfun$1/apply(Ljava/lang/String;)I...invokedynamic #0:apply:()Ljava/util/function/Function; // 调用它的map()函数 invokeinterface java/util/stream.../Stream.map: (Ljava/util/function/Function;)Ljava/util/stream/Stream; InvokeDynamic魔术：在Java 7中添加了此JVM...、返回一个Integer lambdas/Lambda1.lambda$0:(Ljava/lang/String;)Ljava/lang/Integer; 存储在.class中单独的表中的条目中，＃0参数传递给指令点...aload_0 invokevirtual java/lang/String.length:() invokestatic java/lang/Integer.valueOf:(I)Ljava/lang

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java JVM 报C __libc_res_nquery+0x4dd 解决

/String;)[Ljava/net/InetAddress;+0 j java.net.InetAddress$2.lookupAllHostAddr(Ljava/lang/String;)[Ljava...;)[Ljava/net/InetAddress;+51 j java.net.InetAddress.getAllByName0(Ljava/lang/String;Ljava/net/InetAddress...;Z)[Ljava/net/InetAddress;+29 j java.net.InetAddress.getAllByName(Ljava/lang/String;Ljava/net/InetAddress...;+2 j java.net.InetAddress.getByName(Ljava/lang/String;)Ljava/net/InetAddress;+1 j java.net.InetSocketAddress...(Ljava/lang/String;I)V+15 j sun.net.NetworkClient.doConnect(Ljava/lang/String;I)Ljava/net/Socket

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JVM常量池和运行时常量池「建议收藏」

:(Ljava/lang/String;)V #5 = Class #26 // org/memory/jvm/t5/HelloWorld #6 = Class.../memory/jvm/t5/HelloWorld; #14 = Utf8 main #15 = Utf8 ([Ljava/lang/String...= Utf8 (Ljava/lang/String;)V // =======================================虚拟机中执行编译的方法====...[Ljava/lang/String;)V // main方法访问修饰符描述 flags: ACC_PUBLIC, ACC_STATIC // main方法中的代码执行部分 // ===========...// main方法JVM指令码 public static void main(java.lang.String[]); descriptor: ([Ljava/lang/String;)V // main

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Maven 项目下slf4j 包冲突问题

由于Maven jar包是自动依赖..但是jar包依赖的版本不一样 ..会造成冲突就比如遇到: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker...;Ljava/lang/String;ILjava/lang/String; 说的 slf4j 的版本不一致的造成....解决方案: 先引入slf4j 不要让其他Jar自动依赖下载的 ,而是全部依赖我们自定义.... org.slf4j slf4j-api 1.7.1... 在pom.xml 的 Dependency Hierarchy 视图中选择相关slf4j的包右键exclude ?

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关于for循环的再次理解

19: invokestatic #6 // Method java/util/Arrays.asList:([Ljava/lang/Object;)Ljava...java/util/List.iterator:()Ljava/util/Iterator; 29: astore_2 30: aload_2 31: invokeinterface...Ljava/lang/Object; 45: checkcast #2 // class java/lang/String 48: astore..._3 49: getstatic #10 // Field java/lang/System.out:Ljava/io/PrintStream;...关于 Iterator，我们知道任何继承了 Collection的类都需要默认实现一下 Iterator的接口，比如 hasNext(), next()，从源码上来看的话，可以确定的是 for循环也是通过迭代器来实现遍历的

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你还在把Java当成Android官方开发语言吗？Kotlin了解一下！

/util/ListLjava/lang/Integer;>;II)V // declaration: void swap(java.util.Listlang.Integer>, int..., int) public final static swap(Ljava/util/List;II)V @Lorg/jetbrains/annotations/NotNull;() //.../lang/Object;Ljava/lang/String;)V L1 LINENUMBER 8 L1 ALOAD 0 ILOAD 1 INVOKEINTERFACE.../List.get (I)Ljava/lang/Object; INVOKEINTERFACE java/util/List.set (ILjava/lang/Object;)Ljava/lang.../Integer.valueOf (I)Ljava/lang/Integer; INVOKEINTERFACE java/util/List.set (ILjava/lang/Object;)Ljava

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没使用加号拼接字符串，面试官竟然问我为什么

#2 // Method java/util/Calendar.getInstance:()Ljava/util/Calendar; 3: invokevirtual...#3 // Method java/util/Calendar.getTimeInMillis:()J 6: lstore_1 7: ldc...:(Ljava/lang/String;)Ljava/lang/StringBuilder; 32: iload 4 34: invokevirtual #8...#7 // Method java/lang/StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder.../StringBuilder.append:(J)Ljava/lang/StringBuilder; 77: invokevirtual #9 // Method

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Kotlin扩展函数与实现机制探索

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JAVA 8 反射获取参数名

: false # 方法二 public boolean ExampleMethods.methodWithList(java.util.Listlang.String...: false # 方法三 public void ExampleMethods.genericMethod(T[],java.util.Collection)...Return type: int Generic return type: int Parameter class: class [Ljava.lang.String;...Return type: int Generic return type: int Parameter class: class [Ljava.lang.String;...: false # 方法三 public void ExampleMethods.genericMethod(T[],java.util.Collection)

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点击加载更多

java lambda 原理分析

《Kotlin 程序设计》第四章 Kotlin 语法基础

IDEA插件ASM Bytecode Outline

《Kotlin 程序设计》第九章 Kotlin与Java混合调用

JavaAgent+ASM字节码插桩采集方法名称以及入参和出参结果并记录方法耗时

ASM字节码编程 | JavaAgent+ASM字节码插桩采集方法名称以及入参和出参结果并记录方法耗时

错误信息：java.lang.AbstractMethodError

原荐 JVM笔记整理

研究学习Kotlin的一些方法

The calling method‘s class, org.redisson.spring.data.connection.RedissonConnection

Kotlin 类扩展实现原理

Java与Scala如何编译Lambda表达式？

java JVM 报C __libc_res_nquery+0x4dd 解决

JVM常量池和运行时常量池「建议收藏」

Maven 项目下slf4j 包冲突问题

关于for循环的再次理解

你还在把Java当成Android官方开发语言吗？Kotlin了解一下！

没使用加号拼接字符串，面试官竟然问我为什么

Kotlin扩展函数与实现机制探索

JAVA 8 反射获取参数名

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