已知一个字符串，返回将字符串中的非字母字符都删除后的字符串

 

//class StringEditor

public class StringEditor
{
	public static String removeNonLetters(String original)
	{
		StringBuffer aBuffer=new StringBuffer(original.length());
		char aCharacter;
		for(int i=0;i

//class StringEditorTester

public class StringEditorTester
{
  public static void main(String args[])
  {
    String original="hello123,my name is mark,234i think you are my classmate?!!";
    System.out.println(StringEditor.removeNonLetters(original));
  }
}

结果