Upgrade Eclipse java compiler

Question

I started using Ant, that ships with Eclipse. It annoys me, that I get hundreds of warnings in the lines of:

[javac] warning: java\\io\\BufferedInputStr

Answer 1

Major version 51 is Java 7 - looks like you're developing against a preview Java 7 API library but compiling with a Java 6 javac. Either make sure ant uses the Java 7 compiler, or use a Java 6 API library to compile against.