Stream.of("1","2","3","4")这个是输入我想得到1,2,3,4的输出，怎么写？
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用reduce
Stream.of("1","2","3","4").reduce((a,b) -> a +"," +b))
如果你跟我一樣不懂reduce事幹啥的話
String.join(",", stringStream.collect(Collectors.toList()));
轉變思維有點難啊
雷雷
用reduce
如果你跟我一樣不懂reduce事幹啥的話
轉變思維有點難啊
雷雷