Restrict Characters using regex matches in java

Question

Basically i have a java String which i want to restrict all the characters other than this regex code String UcharSet = "^[a-zA-Z0-9-~!@#().]+"; if("hello.hi".matches(UcharSet)){ UNotAllowedCharEC = "0x00000030"; } now the problem is that my if statement always gets to execute although i have my regex to allow . so i really appreciate if somebody tell me what am i doing wrong. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

first i create a boolean which is equal to "hi+hello".matches(UcharSet) and i needed to create an if statement and see if it returned true or false: boolean UMORN = "hi+hello".matches(UcharSet); if(UMORN != true) UNotAllowedCharEC = "0x00000030";