javac

问题 I am running on a windows 7 machine. I installed java jdk 1.7. I have set the Path and PATH environment variable to point to the java jdk 1.7/bin directory. executing java -version in the command prompt yields java version 1.7.0_45 ... however when I execute javac it says that javac is not recognized as an internal or external command ... I am really stumped on this problem. I really want to get this resolved ASAP. If anyone has experienced similar issues can you please share. All other

问题 I have a code: import javax.swing.SwingUtilities; import java.io.File; import java.io.IOException; class RunIt{ if (args.length==0) { ProcessBuilder pb = new ProcessBuilder("java","-Xmx768m","RunIt","anArgument"); pb.directory(new File(".")); try { Process process = pb.start(); } catch(IOException e) { e.printStackTrace(); } System.exit(0); } SwingUtilities.invokeLater(new Runnable(){public void run(){new classWithJFrameInConstructor();}}); } import JFrame; class classWithJFrameInConstructor{

问题 Hi i'm planning on porting the javac compiler and dx converter to android..Is this going to be a trivial Task or are there any major Roadblocks? My idea is to create an app so that people can compile java source code in the android devices and maybe even make android apps in the same android devices... is this possible? 回答1: Most people would not consider it trivial. You list javac and dx as things that need to be ported. Those are certainly requirements. You would need to create an ARM port

问题 Background I have to contact different kind of Java project with various of build system. Sometimes the directory structure is different from the package hierarchy. So it is difficult to package. Even if the build system like Maven and Gradle have its own function to pack .jar but it need a qualified internet connection and a giant size of local repository. Hence I usually build the library I need on the desktop in my office. However I spend more time on my laptop which doesn't have such good

问题 I tried to compile java code, but I got the error: Caused by: java.io.IOException: Cannot run program "C:\jdk\bin\javac": CreateProcess error=206, The filename or extension is too long. This is the content of my build file: <path id="was.runtime"> <!-- <fileset dir="C:\Users\Administrator\.jenkins\workspace\BUILD2TEST\BUILD2TEST\WebContent\WEB-INF\lib"> <include name="*.jar"/> </fileset> --> <fileset dir="${copy.from.path}/WebContent/WEB-INF/lib"> <include name="*.jar" /> </fileset> <fileset

问题 I currently have a method that does the follow: given: value, offset, stride, it adds offset to value keeping it within a group of size stride. Examples: 20, 5, 30 => 25 29, 5, 30 => 4 42, 5, 30 => 47 And my current code is: int cycle(int value, int offset, int stride) { final int rem = value % stride; return ((rem + offset) % stride - rem + value); } Which compiles to the following: int cycle(int, int, int); Code: 0: iload_1 1: iload_3 2: irem 3: istore 4 5: iload 4 7: iload_2 8: iadd 9:

问题 I'm trying to run a very simple one class "Hello World" program from the command line in Windows. The .java file is located at "C:\Users\UserName\Desktop\direcName". The package is deem and the class name is test . I can cd to the directory and compile it from there using javac test.java and that works perfectly fine. However, when I try to run it using: java test or java -classpath directory test or java -cp . test it throws "Exception in thread main java.lang.NoClassDefFoundError: test

问题 I created multiple packages and want to compile and run them. I fiddled around with javac and java and learned about how packages should be named and how a project should be structured. I hope I got all right. But I fail at compilation and running the stuff. I know I could use an IDE for this, but I want to try it with the command-line tools just for curiousity. Here is how my project is organized: Project + src + net + chris + dojo - Program.java + datastructures - Queue.java - LinkedList

问题 This question already has answers here : How do I run a Java program from the command line on Windows? (12 answers) Closed 2 years ago . New programmer here, in terms of actually using an editor and running it. I have created a simple program that states this. public class HelloWorld { public static void main(String[] args) { // Prints "Hello, World" to the terminal window. System.out.println("Hello, World"); } } I have already set the path to "C:\Program Files\Java\jdk1.8.0_151\bin\" .

问题 I have a bunch of java files and I am running the following code in an attempt to compile them. "\Program Files\Java\jdk1.6.0_16\bin\javac" Main.java And I am being shown this error message Main.java:3: package colourtiler.patternsdoes not exist import colourtiler.patterns.draw; The code it isreferring to is located in the folder patters/PatternColour.java, how can I get it to include this file? thanks 回答1: You need to include its path in the javac/java's -cp or -classpath argument. E.g.