how to use regular expression for validation of String must begin with letter, all other characters can be letter/number/space in java

I am doing validation of String 开发者_运维问答which contains ASAHSHAS,342746726,GHG55656 this valid String and spaces are allowed. Thanks In advance!!

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This should do it.

^[a-zA-Z][a-zA-Z0-9 ]+$

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The regular expression that you are looking for may look like this ^\\w[\\w\\d ,]*$. This is an example using it:

String string = "ASAHSHAS,342746726,GHG55656";
if (string.matches("^\\w[\\w\\d ,]*$")) {
    System.out.println("It matches!");
}
else {
    System.out.println("It does NOT match!");
}