import com.sun.tools.javac.file.ZipFileIndex; //导入依赖的package包/类
void run() throws Exception {
    RelativeFile TEST_ENTRY_NAME = new RelativeFile("java/lang/String.class");

    File f = new File(System.getProperty("java.home"));
    if (!f.getName().equals("jre"))
        f = new File(f, "jre");
    File rt_jar = new File(new File(f, "lib"), "rt.jar");

    JarFile j = new JarFile(rt_jar);
    JarEntry je = j.getJarEntry(TEST_ENTRY_NAME.getPath());
    long jarEntryTime = je.getTime();

    ZipFileIndexCache zfic = ZipFileIndexCache.getSharedInstance();
    ZipFileIndex zfi = zfic.getZipFileIndex(rt_jar, null, false, null, false);
    long zfiTime = zfi.getLastModified(TEST_ENTRY_NAME);

    check(je, jarEntryTime, zfi + ":" + TEST_ENTRY_NAME.getPath(), zfiTime);

    Context context = new Context();
    JavacFileManager fm = new JavacFileManager(context, false, null);
    ZipFileIndexArchive zfia = new ZipFileIndexArchive(fm, zfi);
    JavaFileObject jfo =
        zfia.getFileObject(TEST_ENTRY_NAME.dirname(),
                               TEST_ENTRY_NAME.basename());
    long jfoTime = jfo.getLastModified();

    check(je, jarEntryTime, jfo, jfoTime);

    if (errors > 0)
        throw new Exception(errors + " occurred");
}
 

import com.sun.tools.javac.file.ZipFileIndex; //导入依赖的package包/类
void run() throws Exception {
    RelativeFile TEST_ENTRY_NAME = new RelativeFile("java/lang/String.class");

    File f = new File(System.getProperty("java.home"));
    if (!f.getName().equals("jre"))
        f = new File(f, "jre");
    File rt_jar = new File(new File(f, "lib"), "rt.jar");

    JarFile j = new JarFile(rt_jar);
    JarEntry je = j.getJarEntry(TEST_ENTRY_NAME.getPath());
    long jarEntryTime = je.getTime();

    ZipFileIndex zfi =
            ZipFileIndex.getZipFileIndex(rt_jar, null, false, null, false);
    long zfiTime = zfi.getLastModified(TEST_ENTRY_NAME);

    check(je, jarEntryTime, zfi + ":" + TEST_ENTRY_NAME.getPath(), zfiTime);

    Context context = new Context();
    JavacFileManager fm = new JavacFileManager(context, false, null);
    ZipFileIndexArchive zfia = new ZipFileIndexArchive(fm, zfi);
    JavaFileObject jfo =
        zfia.getFileObject(TEST_ENTRY_NAME.dirname(),
                               TEST_ENTRY_NAME.basename());
    long jfoTime = jfo.getLastModified();

    check(je, jarEntryTime, jfo, jfoTime);

    if (errors > 0)
        throw new Exception(errors + " occurred");
}