字符串替换正则表达式条件

Question

I have a text

Hello everyone, my name is Ke-

vin, I was born in Indonesia 20-

01-1990. Nice to meet you.

So how can I replace the text to

Hello everyone, my name is Kevin, I was born in Indonesia 20-01-1990. Nice to meet you.

I've tried using String string = string.replace("-\\n" , "");

Hello everyone, my name is Kevin, I was born in Indonesia 2001-1990. Nice to meet you.

so how to put the different case in replace string? between alphabet before "-" and number.

Answer 1

When the hyphen is preceded by a digit, you could use a capturing group to match the digit and the hyphen, and use $1 as replacement:

(?:(\\d-)|-)

• Captures a digit followed by a hyphen
• Or matches a hyphen (not captured)

Code

String string = "Hello everyone, my name is Ke-\nvin, I was born in Indonesia 20-\n01-1990. Nice to meet you.";
String result = string.replaceAll("(?:(\\d-)|-)\\n+" , "$1");

System.out.println(result);

Output

Hello everyone, my name is Kevin, I was born in Indonesia 20-01-1990. Nice to meet you.

Answer 2

字符串结果= string.replaceAll（“-”，“”）。replaceAll（“ \\ r \\ n”，“”）;