标红的代码意义是啥？

[半颗心丶]

public static void newFolder(String folderPath) {
try {
String filePath = folderPath;
filePath = filePath.toString();
java.io.File myFilePath = new java.io.File(filePath);
System.out.println(myFilePath);
if (!myFilePath.exists()&&!myFilePath.isDirectory()) {
myFilePath.mkdirs();
System.out.println("目录创建成功！");
}
} catch (Exception e) {
System.out.println("新建目录操作出错");
e.printStackTrace();
}
}

[xuzuning]

filePath = filePath.toString(); 蛇足