How can I change the value of a key in a hash map?
61,801
Just use Map#put
using the current old key and the new value:
Map<String, String> map = new HashMap<>();
map.put("user", "Luiggi Mendoza");
System.out.println(map);
//replacing the old value
map.put("user", "Oli Charlesworth");
System.out.println(map);
Output:
{user=Luiggi Mendoza}
{user=Oli Charlesworth}
Author by
pgray10
Updated on June 27, 2020Comments
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pgray10 almost 4 years
I have created a hash map that the users input the key and the value. I want to be able to change the value of the hash map if a specific key is entered. I tried the
setValue
method but got nothing. The value and the key are both strings. What method would I use to change this?