1。java对象实例化
Dog myDog = new Dog("花花",3);
2.java中逗号分隔的字符串和List相互转换
String str = "a,b,c";
List<String> result = Arrays.asList(str.split(","));
把list转为字符串
List<String> list = new ArrayList<String>();
list.add("a");
list.add("b");
list.add("c");
String str = StringUtils.join(list.toArray(), ",");
String str = Joiner.on(",").join(list);
3.Java 中int、String的类型转换
s=String.valueOf(i);
i=Integer.parseInt(s);
还不快抢沙发