我是刚开始安装maven的。在执行安装maven的.bat文件时,我得到以下错误。请您检查一下:
Launching environment tests
checking Java 4 compile, java 4 run
[ERROR] COMPILATION ERROR :
[ERROR] Failure executing javac, but could not parse the error:
The system cannot find the path specified.
[ERROR] Failed to ex
我找到了这个,但我不能在Ubuntu上构建安卓项目。当我尝试的时候:
$ ant debug
我得到了:
Unable to locate tools.jar. Expected to find it in /usr/lib/jvm/java-6-openjdk/lib/tools.jar
...
BUILD FAILED
/home/kuba/projects/Android/android-sdk-linux/tools/ant/build.xml:651: The following error occurred while executing this line:
/home/ku
当我用maven编译类时,我遇到了一个问题。堆栈跟踪如下所示:
[ERROR] Failure executing javac, but could not parse the error:
[ERROR] An exception has occurred in the compiler (1.7.0_51). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Incl
为什么这段代码不编译?
public class A {
public class B extends A {
public B(A a) { }
}
void foo() {
A a = new A();
new B(a) { };
}
}
A.java:[7,17] cannot reference this before supertype constructor has been called
如果进行上述任何一项更改,则编译是成功的:
B是私有的,而不是公共的,第7行读取new B(A);而不是new B
我知道Javac编译器能够使用StringBuilder/StringBuffer转换字符串级联StringBuilder,我很想知道是从哪个版本引入的?
我正在使用这个示例代码:
public class Main {
public static void main(String[] args) {
String a = args[0];
String s = "a";
s = s + a;
s = s + "b";
s = s + "c";
s = s + "
我正在安装,它使用自己的SBT副本进行设置。
我在VirtualBox虚拟机中使用Linux Mint。
下面是我从Spark目录spark-0.9.0-incubating运行sudo ./sbt/sbt compile时的错误片段
[error] (core/compile:compile) java.io.IOException: Cannot run program "javac": error=2, No such file or directory
[error] Total time: 181 s, completed Mar 9, 2014 12:48:03
我正在尝试在我的Linux CentOS 5.9服务器上安装MapServer,但仍然得到相同的错误。
checking if --with-java-include-os-name specified... no, autodetected linux
checking for javac... /usr/bin/javac
checking symlink for /usr/bin/javac... /etc/alternatives/javac
checking symlink for /etc/alternatives/javac... /usr/lib/jvm/java-1.4.2-
我通过Eclipse Juno在安装了Java jdk (和jre) 1.6的Unix机器上生成了一个ant文件。在build.xml文件所在的机器上,在eclipse之外运行ant时,一切都很顺利。
现在,问题出在我试图在另一台同时安装了jdk和jre 1.6的机器上运行ant时。下面是我在另一台运行RedHat 3的机器上得到的结果(无法更改):
> ant -version
Apache Ant version 1.5.2-23 compiled on November 12 2003
> java -version
java version "1.6.0_39