8.7节，文件类File，用这个测试，完全没反应，也没文件，测试全是false
public class TestFileClass { public static void main(String[] args){ java.io.File file1=new java.io.File("image/us.gif"); System.out.println("Does it exist?"+file1.exists()); System.out.println("Can it be read?"+file1.canRead()); System.out.println("Can it be writter?"+file1.canWrite()); System.out.println("Is it a directory?"+file1.isDirectory()); System.out.println("Is it a file?"+file1.isFile()); System.out.println("Is it a absolute?"+file1.isAbsolute()); System.out.println("Is it hidden?"+file1.isHidden()); System.out.println("Absolute path is "+file1.getAbsolutePath()); System.out.println("Last modified on "+new java.util.Date(file1.lastModified())); }}
想脱离eclipse，出去用cmd也不行，改改jdk配置什么的。乱了，乱了，一个都不会出来了，疯了，热死了，汗流浃背的，闷死了
