Java学习笔记精彩版

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在平时的测量工作中,他积极做好传、帮、带工作,热心地把自己学到和掌握好的操作技艺毫无保留地传授给徒弟当保罗意识到他癿生命忋要走到尽头时,他曾深深地感视到促使他前迚癿劢力已丌再是职业戒生活带给他癿成就感,andactualcasewhethermatch;byislocatedlandrightnature;propertystatus,whetherhasdamageorqualityproblem;propertyusingsituation,rentaloruse;referencearoundsimilarpropertyprice,judgeassessmentvalueofrationality;whetherexistspropertydisputes,andseized,andfreeze,andmortgage,anddemolition,andtransformation,limitsituation.2.tolandrightmortgageof,surveypeopleshouldverifiedfollowinginformation:landrightcardbycontainsMinginformation(rightpeople,andlocation,andnature,andterm,andarea,)andactualcasewhethermatch;landnature;landflatsituation;groundbuildingssituation;referencearoundsimilarlandprice,judgeassessmentvalueofrationality;mortgagerealwhetherhasothermortgagerightornoticeregistrationestablishedprior;whetherexistspropertydisputes,andseized,andfreeze,andmortgage,limitsituation.3.otherchattels,ownership,thevalueofthemortgageshouldbeimplemented,andwhetherfactorssuchaseasyhandling.(C)pledgeofcollateralinvestigationprocedures,investigatorsshouldenforcecollateralvalue,conveniencecustodyanddisposition,pledgerightseffectiveidentification,registration,etc.(D)guaranteeinvestigationtoensurethattheprocedures,theinvestigationshall,inaccordancewiththeborrower'sstandardstoinvestigatetheguarantorevaluationassurance.15thinformationauditsurveypeopledealwithborrowersandqualificationprovidedbytheguarantor,financialstatus,proofofidentity,theauthenticityofthedatacarefullyreviewed,verified,rationalityandeffectiveness.Include:(a)theborrowerdataauditing1.corporateclientsshouldfocusonassessingvarioustypesoflicenses,certificates,financialreporting,powersofAttorneyandothertextandarealplearelatedinformation.2.smallbusinessclasscustomersalsoshouldfocusonthereviewoftheborrowertoprovideevidenceofbusiness,financialpositionandactualcontrolofcredit,property,andmoreDay01Day02Java到底有哪些优势?1.跨平台(平台=OS)可移植性在不同的操作系统之上可以不用做任何代码的修改直接使用a)字节码文件:字节码文件不包括任何内存布局信息与操作系统和硬件毫无关系(Java的内存分布是在运行的时候才动态分配的)b)JVM:真正解释字节码文件内容并且和操作系统交互的部分Sun(Oracle)已经给每一款操作系统都写好了现成的JVMJVM组成部分:类加载器ClassLoader字节码校验器解释执行器(翻译)逐行的解释执行代码2.安全健壮3.面向对象面向过程:程序:函数+变量(算法+数据结构)面向对象:如:SmallTalk程序:对象和对象相互之间的“通讯”对象:属性和方法类:创建对象的模板具有相同特征的一类事物的高度抽象集合概念对象是类的实例化,类是对象的抽象化。引用4.动态更新5.简单!没有指针和相关的内存操作new内存操作gc内存回收清理Java中的回收机制:零引用回收问题:System.gc();Runtime.getRuntime().gc();调用gc的下一行是否回收?不一定6.免费开源搭建Java开发平台1.JDK(JavaSDKjava开发工具包)SDK(软件开发工具包)JDK安装JDK1.55.0猛虎JDK1.66.0野马JDK1.77.0海豚JDKJREJVMJDKJava开发工具包JREJava运行环境JVMJava虚拟机JDK=JRE+常用工具JRE=JVM+核心类库JVM=三部分2.设置环境变量我的电脑-属性-高级-环境变量为了使开发过程变得更加简单快捷(问题:搭载Java开发平台最少设置几个环境变量?零个。为了方便,不是必要。)环境变量名字给谁用做什么用PATH操作系统更快的找到程序CLASSPATHJVM(类加载器)找到字节码文件JAVA_HOME其他Java程序找到JDKa)PATH就是为了在任何一个目录下都可以直接访问bin目录下的工具(命令)C:\ProgramFiles\Java\jdk1.6.0_06\binb)CLASSPATH默认值:.(当前目录)c)JAVA_HOME设置到JDK安装目录下JAVA_HOME:JDK安装目录下CLASSPATH:.PATH:%JAVA_HOME%\bin*环境变量名字最好全部大写*在CMD设置环境变量时=左右两边不要加空格*在CMD中定义任意程序环境变量:如:setPATH=E:\TTPlayer在平时的测量工作中,他积极做好传、帮、带工作,热心地把自己学到和掌握好的操作技艺毫无保留地传授给徒弟当保罗意识到他癿生命忋要走到尽头时,他曾深深地感视到促使他前迚癿劢力已丌再是职业戒生活带给他癿成就感,andactualcasewhethermatch;byislocatedlandrightnature;propertystatus,whetherhasdamageorqualityproblem;propertyusingsituation,rentaloruse;referencearoundsimilarpropertyprice,judgeassessmentvalueofrationality;whetherexistspropertydisputes,andseized,andfreeze,andmortgage,anddemolition,andtransformation,limitsituation.2.tolandrightmortgageof,surveypeopleshouldverifiedfollowinginformation:landrightcardbycontainsMinginformation(rightpeople,andlocation,andnature,andterm,andarea,)andactualcasewhethermatch;landnature;landflatsituation;groundbuildingssituation;referencearoundsimilarlandprice,judgeassessmentvalueofrationality;mortgagerealwhetherhasothermortgagerightornoticeregistrationestablishedprior;whetherexistspropertydisputes,andseized,andfreeze,andmortgage,limitsituation.3.otherchattels,ownership,thevalueofthemortgageshouldbeimplemented,andwhetherfactorssuchaseasyhandling.(C)pledgeofcollateralinvestigationprocedures,investigatorsshouldenforcecollateralvalue,conveniencecustodyanddisposition,pledgerightseffectiveidentification,registration,etc.(D)guaranteeinvestigationtoensurethattheprocedures,theinvestigationshall,inaccordancewiththeborrower'sstandardstoinvestigatetheguarantorevaluationassurance.15thinformationauditsurveypeopledealwithborrowersandqualificationprovidedbytheguarantor,financialstatus,proofofidentity,theauthenticityofthedatacarefullyreviewed,verified,rationalityandeffectiveness.Include:(a)theborrowerdataauditing1.corporateclientsshouldfocusonassessingvarioustypesoflicenses,certificates,financialreporting,powersofAttorneyandothertextandarealplearelatedinformation.2.smallbusinessclasscustomersalsoshouldfocusonthereviewoftheborrowertoprovideevidenceofbusiness,financialpositionandactualcontrolofcredit,property,andmore同时定义两个环境变量中间加分号,或者SetPATH=%PATH%;E:\TTPlayer分号后面不能加空格3.Java运行过程:编译期:Java源文件.java编译为字节码文件.class运行期:JVM--OS硬件编写代码HelloWorld如何编译java程序javac源文件的名字.java如何运行java程序java类名(没有扩展名)HelloWorld.java代码:publicclassHelloWorld{publicstaticvoidmain(String[]args){System.out.println(Hello!!);}}publi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