Java 中一些問題

Gson全解析（上）-Gson基础 https://www.jianshu.com/p/fc5c9cdf3aab
Java 中 Gson的使用 https://www.cnblogs.com/qinxu/p/9504412.html
java的println和print的区别 https://zhidao.baidu.com/question/324825472.html
Java 实例 - 字符串反转 https://www.runoob.com/java/string-reverse.html
Java Collection类：sort()升序排序、reverse()降序排序、copy()复制、fill()填充 http://c.biancheng.net/view/1072.html

2、Java 8 Lambda 表达式 https://www.runoob.com/java/java8-lambda-expressions.html
java中的void是什么？有什么作用？ https://www.cnblogs.com/ztes/p/7749475.html
java中的“\t” https://www.cnblogs.com/wsg25/p/7521709.html

3、json.dumps()和json.loads() https://www.cnblogs.com/ConnorShip/p/9744223.html

4、Map的用法 https://blog.csdn.net/qq_29373285/article/details/81487594
Java charAt() 方法 https://www.runoob.com/java/java-string-charat.html

5、http://know.zhsho.com/f4a9218f393d02ec037752ba3fd92979.html
num1 = num1 ^ num2; num2 = num1 ^ num2; num1 = num1 ^ num2;
6、python：
li = [1,1,2,3,4,5,6,7,8,9]
for i in li:
if i%2 != 0:
li.remove(i)
print(li)
Java：
li.stream.filter(i%2=0).collector(collector.tolist)