9、在javac及java命令行上使用-classpath （或-cp)选项可以引用别的库
9、在javac及java命令行上使用-classpath （或-cp)选项可以引用别的库
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JDK环境变量都设置好了，在DOS中输入JAVA-VERSION也对 可怎么javac就提示不是内部或外部命令呢环境变量如下CLASSPATH=.\%JAVA_HOME%\libJAVA_HOME="C:\Program Files\Java\jdk1.6.0_02"Path=%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\Program Files\Common Files\TTKN\Bin;C:\Program Files\Rational\common
下面关于path和classpath的说法中,错误的是() A、path用来指定java虚拟机(JVM)所在的目录B、classpath用来指定我们自己所写的或要用到的类文件(.jar文件)所在的目录C、在dos命令行中，classpath和path环境变量的查看与配置的方式不相同D、只要设置了classpath这个环境变量系统就不会再在当前目录下查询某个类
下面关于classpath的说法中,错误的是()。 A、classpath和path环境变量的查看与配置的方式完全相同。B、为了让Java虚拟机能找到所需的class文件，就需要对classpath环境变量进行设置。C、从JDK5.0开始，如果classpath环境变量没有进行设置，Java虚拟机会自动将其设置为“.”，也就是当前目录。D、在命令行窗口中配置了classpath后，重新打开新命令行窗口依然生效
A developer is creating a class Book that needs to access class Paper.The Paper class is deployed in a JARnamedmyLib.jar.Whichthree，taken independently，will allow the developer to use the Paper class while compiling the Book class？（）A、The JAR fileis located at$JAVA_HOME/jre/classes/myLib.jar.B、The JAR fileis located at$JAVA_HOME/jre/lib/ext/myLib.jar.C、TheJ AR fileis located at/foo/myLib.jar and aclasspath environment variable is set that includes /foo/myLib.jar/Paper.class.D、The JAR fileis located at/foo/myLib.jar and a classpath environment variable is set that includes/foo/myLib.jar.E、The JAR file is located at/foo/myLib.jar and the Book class is compiled using javac-cp/foo/myLib.jar/Paper Book.java.F、The JAR file is located at/foo/myLib.jar and the Book class is compiled using javac-classpath/foo/myLib.jar Book.java.
假设在目录myprj/src/school中有Java源文件Student.java，如果希望该文件编译后的类文件出现在目录myprj/classes/school中，应该使用下列哪一个命令？（） A、cd myprj/src javac –d ../classes school/Student.javaB、cd myprj/src javac ../classes school/*.javaC、cd myprj javac –d ../classes school/*.javaD、cd myprj/src/school javac –d ../classes school/Student.java
下列关于classpath环境变量的说法中，哪一个是正确的（）。A、classpath配置一次后可永久使用B、没有classpath环境变量就不能运行Java程序C、classpath环境变量可以让虚拟机找到class文件的目录D、查看当前classpath配置的命令是：classpath
下面说法正确的是（）A、Java程序的源文件名称与主类（puublic class）的名称相同，后缀可以是.java或.txt等B、JDK的编译命令是javaC、一个java源文件编译后可能产生多个class文件D、在命令行编译好的字节码文件，只需在命令行直接输入程序名即可运行该程序
A class games.cards.Poker is correctly defined in the jar file Poker.jar. A user wants to execute the main method of Poker on a UNIX system using the command： java games.cards.Poker What allows the user to do this？（）A、put Poker.jar in directory /stuff/java，and set the CLASSPATH to include /stuff/javaB、put Poker.jar in directory /stuff/java，and set the CLASSPATH to include /stuff/java/*.jarC、Put Poker.jar in directory /stuff/java，and set the CLASSPATH to include /stuff/java/Poker.jarD、put Poker.jar in directory /stuff/java/games/cards，and set the CLASSPATH to include /stuff/javaE、put Poker.jar in directory /stuff/java/games/cards，and set the CLASSPATH to include /stuff/java/*.jarF、put Poker.jar in directory /stuff/java/games/cards，and set the CLASSPATH to include /stuff/java/Poker.jar
class java { public static void main（String [] java） { for （int Java = 1； Java 〈 java.length； Java++） System.out.print（"java "）； } } 和命令行： java java java java java 结果为：（） A、javaB、java javaC、java java javaD、编译失败
A developer is creating a class Book， that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar. Which three， taken independently， will allow the developer to use the Paper class while compiling the Bookclass？（）A、The JAR file is located at $JAVA_HOME/jre/classes/myLib.jar.B、The JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jar..C、The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar/Paper.class.D、The JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar.E、The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac - cp /foo/myLib.jar/Paper Book.java.F、The JAR file is located at /foo/myLib.jar and the Book class is compiled using javac - classpath /foo/myLib.jar Book.java
关于JavaBean正确的说法是（）。A、Java文件与Bean所定义的类名可以不同，但一定要注意区分字母的大小写B、被引用的Bean文件的文件名后缀为.javaC、Bean文件放在任何目录下都可以被引用D、在JSP文件中引用Bean，其实就是用jsp：useBean语句
单选题下面关于path和classpath的说法中，错误的是（）。Apath用来指定java虚拟机（JVM）所在的目录Bclasspath用来指定我们自己所写的或要用到的类文件（.jar文件）所在的目录C在dos命令行中，classpath和path环境变量的查看与配置的方式不相同D只要设置了classpath这个环境变量系统就不会再在当前目录下查询某个类
多选题A developer is creating a class Book that needs to access class Paper.The Paper class is deployed in a JARnamedmyLib.jar.Whichthree，taken independently，will allow the developer to use the Paper class while compiling the Book class？（）AThe JAR fileis located at$JAVA_HOME/jre/classes/myLib.jar.BThe JAR fileis located at$JAVA_HOME/jre/lib/ext/myLib.jar.CTheJ AR fileis located at/foo/myLib.jar and aclasspath environment variable is set that includes /foo/myLib.jar/Paper.class.DThe JAR fileis located at/foo/myLib.jar and a classpath environment variable is set that includes/foo/myLib.jar.EThe JAR file is located at/foo/myLib.jar and the Book class is compiled using javac-cp/foo/myLib.jar/Paper Book.java.FThe JAR file is located at/foo/myLib.jar and the Book class is compiled using javac-classpath/foo/myLib.jar Book.java.
多选题A developer is creating a class Book, that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar. Which three, taken independently, will allow the developer to use the Paper class while compiling the Book class?（）AThe JAR file is located at $JAVA_HOME/jre/classes/myLib.jar.BThe JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jar..CThe JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar/Paper.class.DThe JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar.EThe JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -cp /foo/myLib.jar/Paper Book.java.FThe JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -d /foo/myLib.jar Book.javaGThe JAR file is located at /foo/myLib.jar and the Book class is compiled using javac -classpath /foo/myLib.jar Book.java
多选题A developer is creating a class Book， that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar. Which three， taken independently， will allow the developer to use the Paper class while compiling the Bookclass？（）AThe JAR file is located at $JAVA_HOME/jre/classes/myLib.jar.BThe JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jar..CThe JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar/Paper.class.DThe JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar.EThe JAR file is located at /foo/myLib.jar and the Book class is compiled using javac - cp /foo/myLib.jar/Paper Book.java.FThe JAR file is located at /foo/myLib.jar and the Book class is compiled using javac - classpath /foo/myLib.jar Book.java
多选题A developer is creating a class Book， that needs to access class Paper. The Paper class is deployed in a JAR named myLib.jar. Which three， taken independently， will allow the developer to use the Paper class while compiling the Book class？（）AThe JAR file is located at $JAVA_HOME/jre/classes/myLib.jarBThe JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jarCThe JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jar/Paper.classDThe JAR file is located at /foo/myLib.jar and a classpath environment variable is set that includes /foo/myLib.jarEThe JAR file is located at /foo/myLib.jar and the Book class is compiled using javac –cp /foo/myLib.jar/Paper Book.javaFThe JAR file is located at foo/myLib.jar and the Book class is compiled using javac –classpath /foo/myLib.jar Book.java
单选题下面关于classpath的说法中，错误的是（）。Aclasspath和path环境变量的查看与配置的方式完全相同。B为了让Java虚拟机能找到所需的class文件，就需要对classpath环境变量进行设置。C从JDK5.0开始，如果classpath环境变量没有进行设置，Java虚拟机会自动将其设置为“.”，也就是当前目录。D在命令行窗口中配置了classpath后，重新打开新命令行窗口依然生效
单选题A class games.cards.Poker is correctly defined in the jar file Poker.jar. A user wants to execute the main method of Poker on a UNIX system using the command： java games.cards.Poker What allows the user to do this？（）A put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/javaB put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/java/*.jarC Put Poker.jar in directory /stuff/java， and set the CLASSPATH to include /stuff/java/Poker.jarD put Poker.jar in directory /stuff/java/games/cards， and set the CLASSPATH to include /stuff/javaE put Poker.jar in directory /stuff/java/games/cards， and set the CLASSPATH to include /stuffijava/*.jarF put Poker.jar in directory /stuff/java/games/cards， and set the CLASSPATH to include /stuff/java/Poker.jar
单选题下面说法正确的是（）AJava程序的源文件名称与主类（puublic class）的名称相同，后缀可以是.java或.txt等BJDK的编译命令是javaC一个java源文件编译后可能产生多个class文件D在命令行编译好的字节码文件，只需在命令行直接输入程序名即可运行该程序