javac

JAVA环境变量中 classpath、path、JAVA_HOME的作用

由 拈花ヽ惹草 提交于 2020-03-18 21:54:13
3 月，跳不动了？>>> ..................................................................................................................................................... 1. PATH环境变量。作用是 指定命令搜索路径 ，在命令行下面执行命令如javac编译java程序时，它会到PATH变量所指定的路径中查找看是否能找到相应的命令程序。我们需要把jdk安装目录下的bin目录增加到现有的PATH变量中，bin目录中包含经常要用到的可执行文件如javac/java/javadoc等待，设置好PATH变量后，就可以在任何目录下执行javac/java等工具了。我们这里设定的PATH值为： %SystemRoot%/system32;%SystemRoot%;%SystemRoot%/System32/Wbem;%SYSTEMROOT%/System32/WindowsPowerShell/v1.0/;C:/Program Files/Common Files/Thunder Network/KanKan/Codecs;C:/Program Files/Microsoft SQL Server/90/Tools/binn/;C:

AdaptRecursive StackOverflowError

由 筅森魡賤 提交于 2020-02-25 06:36:05
问题 While compiling my project I get: The system is out of resources. Consult the following stack trace for details. java.lang.StackOverflowError at com.sun.tools.javac.code.Type$WildcardType.isSuperBound(Type.java:435) at com.sun.tools.javac.code.Types$1.visitWildcardType(Types.java:102) at com.sun.tools.javac.code.Types$1.visitWildcardType(Types.java:98) at com.sun.tools.javac.code.Type$WildcardType.accept(Type.java:416) at com.sun.tools.javac.code.Types$MapVisitor.visit(Types.java:3232) at com

AdaptRecursive StackOverflowError

由 半世苍凉 提交于 2020-02-25 06:35:59
问题 While compiling my project I get: The system is out of resources. Consult the following stack trace for details. java.lang.StackOverflowError at com.sun.tools.javac.code.Type$WildcardType.isSuperBound(Type.java:435) at com.sun.tools.javac.code.Types$1.visitWildcardType(Types.java:102) at com.sun.tools.javac.code.Types$1.visitWildcardType(Types.java:98) at com.sun.tools.javac.code.Type$WildcardType.accept(Type.java:416) at com.sun.tools.javac.code.Types$MapVisitor.visit(Types.java:3232) at com

Java compiler automatically renaming parameters (obfuscating)

由 纵然是瞬间 提交于 2020-02-23 11:30:31
问题 When I compile the code I am writing, then look at in a a JD Gui, methods show up with headers such as the following: public void growSurface(Random paramRandom, int paramInt1, int paramInt2){ I am compiling through a .bat file. Is there a way to specify that I don't want to obfuscate the code. 回答1: By default javac is not including debug information in generated class files. This information is e.g. method parameter names (but method and field names are always stored to allow reflection).

Java compiler automatically renaming parameters (obfuscating)

由 Deadly 提交于 2020-02-23 11:29:30
问题 When I compile the code I am writing, then look at in a a JD Gui, methods show up with headers such as the following: public void growSurface(Random paramRandom, int paramInt1, int paramInt2){ I am compiling through a .bat file. Is there a way to specify that I don't want to obfuscate the code. 回答1: By default javac is not including debug information in generated class files. This information is e.g. method parameter names (but method and field names are always stored to allow reflection).

Java compiler automatically renaming parameters (obfuscating)

由 淺唱寂寞╮ 提交于 2020-02-23 11:29:10
问题 When I compile the code I am writing, then look at in a a JD Gui, methods show up with headers such as the following: public void growSurface(Random paramRandom, int paramInt1, int paramInt2){ I am compiling through a .bat file. Is there a way to specify that I don't want to obfuscate the code. 回答1: By default javac is not including debug information in generated class files. This information is e.g. method parameter names (but method and field names are always stored to allow reflection).

Compiling multiple jar and java files using javac

由 六月ゝ 毕业季﹏ 提交于 2020-02-22 07:20:48
问题 I downloaded a sample code written in java that has multiple jar files and java files. I am not a Java programmer so I am having a hard time compiling the code. Here's my attempt: javac -classpath lib/*.jar src/*.java However this is what I get: javac: invalid flag: lib/dom4j-1.6.1.jar Usage: javac <options> <source files> use -help for a list of possible options What's wrong with my approach and how can I compile the code? ALl the jar files are located in the lib folder, and the java files

Compiling multiple jar and java files using javac

由 青春壹個敷衍的年華 提交于 2020-02-22 07:18:37
问题 I downloaded a sample code written in java that has multiple jar files and java files. I am not a Java programmer so I am having a hard time compiling the code. Here's my attempt: javac -classpath lib/*.jar src/*.java However this is what I get: javac: invalid flag: lib/dom4j-1.6.1.jar Usage: javac <options> <source files> use -help for a list of possible options What's wrong with my approach and how can I compile the code? ALl the jar files are located in the lib folder, and the java files

How does java generics syntax help avoid type casting?

由 ≯℡__Kan透↙ 提交于 2020-01-30 13:21:57
问题 Below is the code, import java.util.List; import java.util.ArrayList; public class Dummy { public static void main(String[] args) { List<String> lst = new ArrayList<String>(); lst.add("a string"); lst.add("another string"); String s = lst.get(0); } //end main } when the constructor new ArrayList<String>(); is invoked, array of type Object is created. .. lst holds Object[0] array. So, If array of type Object gets created by constructor, How does javac does not see type casting issue in this

How does java generics syntax help avoid type casting?

由 ▼魔方 西西 提交于 2020-01-30 13:20:26
问题 Below is the code, import java.util.List; import java.util.ArrayList; public class Dummy { public static void main(String[] args) { List<String> lst = new ArrayList<String>(); lst.add("a string"); lst.add("another string"); String s = lst.get(0); } //end main } when the constructor new ArrayList<String>(); is invoked, array of type Object is created. .. lst holds Object[0] array. So, If array of type Object gets created by constructor, How does javac does not see type casting issue in this
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