Menu
When I do System.out.println(map) in Java, I get a nice output in stdout. How can I obtain this same string representation of a Map in a variable without meddling with standard output? Something like String mapAsString = Collections.toString(map)?
811
Use Object#toString() . String string = map. toString();
Now need is to convert the String to a Map object so that each student roll number becomes the key of the HashMap, and the name becomes the value of the HashMap object. In order to convert strings to HashMap, the process is divided into two parts: The input string is converted to an array of strings as output.
8 Answers. Show activity on this post. Then you can create a Map<String,ComputeString> object like you want in the first place. Using a map will be much faster than reflection and will also give more type-safety, so I would advise the above.
Use Object#toString().
String string = map.toString(); That's after all also what System.out.println(object) does under the hoods. The format for maps is described in AbstractMap#toString().
Returns a string representation of this map. The string representation consists of a list of key-value mappings in the order returned by the map's
entrySetview's iterator, enclosed in braces ("{}"). Adjacent mappings are separated by the characters ", " (comma and space). Each key-value mapping is rendered as the key followed by an equals sign ("=") followed by the associated value. Keys and values are converted to strings as byString.valueOf(Object).
200
You can also use google-collections (guava) Joiner class if you want to customize the print format
Joiner.on(",").withKeyValueSeparator("=").join(map); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
