是一款用JAVA 编写的编译器 具有很强的编译功能

				/*				 * @test  /nodynamiccopyright/				 * @bug 6177732				 * @summary add hidden option to have compiler generate diagnostics in more machine-readable form				 * @compile/ref=Warning.out -XDrawDiagnostics -XDstdout -Xlint:unchecked Warning.java				 */								import java.util.HashSet;				import java.util.Set;								class Warning				{				    static void useUnchecked() {					Set s = new HashSet();					s.add("abc");				    }				}