Java利用正则表达式如何实现查找换行符

package nlMatch;import java.util.regex.Pattern;public class NLMatch { public static void main(String[] args) {  String input = "I dream of engines\nmore engines, all day long";  System.out.println("INPUT:" + input);  System.out.println();  String[] patt = {"engines.more engines", "ines\nmore", "engines$"};  for (int i = 0; i < patt.length; i++) {   System.out.println("PATTERN:" + patt[i]);   boolean found;   Pattern p1l = Pattern.compile(patt[i]);   found = p1l.matcher(input).find();   System.out.println("DEFAULT match " + found);   // .代表任何符号（DOT ALL），   Pattern pml = Pattern.compile(patt[i], Pattern.DOTALL | Pattern.MULTILINE);   found = pml.matcher(input).find();   System.out.println("Multiline match " + found);   System.out.println();  } }}