http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
class org.apache.fop.cli.Main$1 implements java.io.FileFilter
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.apache.fop.cli.Main$1
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.apache.fop.cli.Main$1 this
         0: .line 76
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.apache.fop.cli.Main$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/apache/fop/cli/Main$1;

  public boolean accept(java.io.File);
    descriptor: (Ljava/io/File;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.apache.fop.cli.Main$1 this
        start local 1 // java.io.File pathname
         0: .line 78
            aload 1 /* pathname */
            invokevirtual java.io.File.getName:()Ljava/lang/String;
            ldc ".jar"
            invokevirtual java.lang.String.endsWith:(Ljava/lang/String;)Z
            ireturn
        end local 1 // java.io.File pathname
        end local 0 // org.apache.fop.cli.Main$1 this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    1     0      this  Lorg/apache/fop/cli/Main$1;
            0    1     1  pathname  Ljava/io/File;
    MethodParameters:
          Name  Flags
      pathname  
}
SourceFile: "Main.java"
EnclosingMethod: org.apache.fop.cli.Main.getJARList:()[Ljava/net/URL;
NestHost: org.apache.fop.cli.Main
InnerClasses:
  org.apache.fop.cli.Main$1