import java.util.ArrayList; import java.util.List; /** * 使用stream流的方式過濾和遍歷集合 * @author wukefan * */ public class Test { public static void main(String[] args) { // TODO Auto-generated method stub List<String> list = new ArrayList<>(); list.add("張三"); list.add("李四光"); list.add("吳克x"); list.add("吳x"); list.add("吳xx"); list.stream() .filter(name -> name.startsWith("吳")) .filter(name-> name.length()==3) .forEach(name->System.out.println(name)); } }