将java中的半角字符串转换为全角

Question

Consider a half width string 'Hello'. What java library should I use to get its full width equivalent which is 'Ｈｅｌｌｏ'.

Any sample code is also appreciated.

Answer 1

Half and full width characters differ by 65248 . So all you need to do is simply add that number to each character.

Example with stream:

public static String toFullWidth(String halfWidth) {
  return halfWidth.chars()
    .map(c -> c + 65248)
    .collect(
      StringBuilder::new, 
      (builder, c) -> builder.append((char) c), 
      StringBuilder::append
    )
    .toString();
}

Example with loop:

public static String toFullWidthWithLoop(String halfWidth) {
  StringBuilder builder = new StringBuilder();
  for (char c : halfWidth.toCharArray()) {
    builder.append((char) (c + 65248));
  }
  return builder.toString();
}

Answer 2

Try this :

    String s = "Hello" ;
    System.out.println(s.replaceAll(""," ")) ;

you will get H ello