関連ワード:  java get first 3 characters of string    java get first 3 letters of string    java code to get first 3 characters of string    java first 3 characters of string    java print first 3 characters of string    java compare first 3 characters of string    java delete first 3 characters of string    java get first 4 characters of string    java substring first 4 characters  
結果 : java get first 3 characters of string