e015. getting an absolute filename path from a relative filename path.txt

来自「这里面包含了一百多个JAVA源文件」· 文本 代码 · 共 14 行

 File file = new File("filename.txt");
    file = file.getAbsoluteFile();  // c:\temp\filename.txt
    
    file = new File("dir"+File.separatorChar+"filename.txt");
    file = file.getAbsoluteFile();  // c:\temp\dir\filename.txt
    
    file = new File(".."+File.separatorChar+"filename.txt");
    file = file.getAbsoluteFile();  // c:\temp\..\filename.txt
    
    // Note that filename.txt does not need to exist

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