Method open

ij/src/main/java/ij/plugin/Compiler.java:223–263

(String path, String msg)

	 // open the .java source file
	 boolean open(String path, String msg) {
		boolean okay;
		String fileName, directory;
		if (path.equals("")) {
			if (dir==null) dir = IJ.getDirectory("plugins");
			OpenDialog od = new OpenDialog(msg, dir, name);
			directory = od.getDirectory();
			fileName = od.getFileName();
			okay = fileName!=null;
			String lcName = okay?fileName.toLowerCase(Locale.US):null;
			if (okay) {
				if (msg.startsWith("Compile")) {
					if (!(lcName.endsWith(".java")||lcName.endsWith(".class"))) {
						IJ.error("File name must end with \".java\" or \".class\".");
						okay = false;
					}
				} else if (!(lcName.endsWith(".java")||lcName.endsWith(".txt")||lcName.endsWith(".ijm")||lcName.endsWith(".js")||lcName.endsWith(".py")||lcName.endsWith(".bsh"))) {
					IJ.error("File name must end with \".java\", \".txt\", \".ijm\", \".js\" or \".py\"");
					okay = false;
				}
			}
		} else {
			int i = path.lastIndexOf('/');
			if (i==-1)
				i = path.lastIndexOf('\\');
			if (i>0) {
				directory = path.substring(0, i+1);
				fileName = path.substring(i+1);
			} else {
				directory = "";
				fileName = path;
			}
			okay = true;
		}
		if (okay) {
			name = fileName;
			dir = directory;
			Editor.setDefaultDirectory(dir);
		}
		return okay;
	}

	// only show files with names ending in ".java"
	// doesn't work with Windows