javac

So guys, I'm trying to play a bit with Javac Cross compilation with Ant and on terminal. Locally and on an integration environment and i'm having the same problem on the very basic problem. I run this in the linux terminal (and also on my cygwin on windows and the cmd): javac -target 1.6 -source 1.7 -bootclasspath /usr/java/jdk1.6.0_27/jre/lib/rt.jar Main.java with Main.java with nothing other than a System.out.println. javac -version ==> javac 1.7.0_11 I'm getting the error message: javac: source release 1.7 requires target release 1.7 I have roughly the same configuration on my local windows

There has been some buzz about a tool called sjavac on the OpenJDK mailing lists. Also, there are two related JEPs: JEP 139: Enhance javac to Improve Build Speed and JEP 199: Smart Java Compilation, Phase Two . My questions are: What exactly is the sjavac tool? Who is it intended for? How do I use it? Disclaimer: Self answered question. Just wanted to bring the knowledge of this tool to the StackOverflow community and to create a reference to future sjavac FAQ. What exactly is the sjavac tool? The sjavac tool is an (allegedly smart ) wrapper around javac , developed at Oracle and intended to

安装java jdk 有个基本常识 就是安装后要配置 java_home ，path和classpath， 而且安装路径不能有 空格。方法网上多的是，这里变不加赘述。 我在安装的时候出现了一个很难发现的问题（— -）——如题所述。在网上找了 很久，重新设置了很多次路径，电脑也重启了，就是没用。 原因：jdk和jre安装在同一个文件夹，jre覆盖了jdk的jre文件夹（总共两个哦）。 导致jre文件夹消失了一个！！所以安装java的时候要注意选择路径。或者干脆 使用默认路径。 然后path就都不用设置了，因为已经设置过了，除非你么设置或者换了文件夹安装了。 来源： oschina 链接： https://my.oschina.net/u/264056/blog/79374

Given the following directory structure: /top |--- wrk |--- pkg |--- A.java |--- B.java Assume that the two files A.java and B.java contain the following code, respectively: // Filename: A.java package pkg; class A { B b; } // Filename: B.java package pkg; class B {...} Assuming that the current directory is /top/wrk Why does the command javac -cp . pkg/A.java work successfully even though we have not yet compiled B.java ? Also if the current directory is /top/wrk/pkg then the command javac A.java works. How so? Why does the command javac -cp . pkg/A.java work successfully even though we have

Consider the following two Java classes: a.) class Test { void foo(Object foobar) { } } b.) class Test { void foo(pkg.not.in.classpath.FooBar foobar) { } } Furthermore, assume that pkg.not.in.classpath.FooBar is not found in the classpath. The first class will compile fine using the standard javac. However, the second class won't compile and javac will give you the error message "package pkg.not.in.classpath does not exist" . The error message is nice in the general case since checking your dependencies allows the compiler to tell you if you got some method argument wrong, etc. While nice and

I have written a Java code which imports an external jar file. How can I compile and run it on the command-line? Thanks in advance! Compiling from the command-line: javac -cp path_to_jar1.jar:path_to_jar2.jar Example.java Running: java -cp .:path_to_jar1.jar:path_to_jar2.jar Example For Windows, use ; as a path-separator (instead of : ). 来源： https://stackoverflow.com/questions/4421730/importing-external-jar-files