rt.jar

今天在eclipse mars中导入一个外部项目，在编译时出现了下面的错误： Access restriction: The type 'BASE64Encoder' is not API (restriction on required library 'C:\Program Files\Java\jre1.8.0_20\lib\rt.jar') 出现这个错误，是因为调用了Eclipse或MyEclipse自带的jre运行库，访问“rt.jar”的会出现“访问限制” 解决方法有两种： 1.不调用Eclipse等集成环境自带的jre，替换成自己安装的JDK就可以了。 如下图： 2.Eclipse 默认把这些受访问限制的API设成了ERROR。找到eclipse的Window下拉菜单，Preferences -> Java -> Complicer -> Errors/Warnings，将里面的Deprecated and restricted API中的Forbidden references(access rules)选为Warning就可以编译通过。 如下图： 来源： oschina 链接： https://my.oschina.net/u/75789/blog/547908

InetAddress.getLocalHost().getHostName() is no more getting the name of the HostName since I switched to java 8 ... with the jdk1.8 the InetAddress.getLocalHost().getHostName() returns "localhost". Before (when I was using jdk1.6) it gives me the right hostname (which is "ACTION03") according to the network config : cat /etc/sysconfig/network NETWORKING=yes HOSTNAME=ACTION03 any help ? Works for me on Linux (Ubuntu 14.04) with Java 1.8.0_05. public class HostName { public static void main(String[] args) throws Exception { System.out.println(java.net.InetAddress.getLocalHost().getHostName()); }