Parenthesize the string。 Descr iption Let us define a multiplication operation on three symbols a,b,c according to the following table; thus ab = b, ba = c, and so on. Notice that the multiplication operation defined by the table is neither associat
操作String，提供了很多简便的API public class TestLang { public static void main(String[] args) { String str1 = StringUtils.repeat("Java", 10); System.out.println(str1); String str2 = StringUtils.abbreviate("how long no see you", 12); System.out.println(str2);
