Integer (Java Platform SE 8 )

https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html

An object of type Integer contains a single field whose type is int . In addition, this class provides several methods for converting an int to a String and a ...

JAVAstringint 互相转化| 菜鸟教程

http://www.runoob.com/w3cnote/java-string-and-int-convert.html

int -> String. int i=12345;. String s="";. 第一种方法:s=i+"";. 第二种方法:s=String.valueOf(i);. 这两种方法有什么区别呢?作用是不是一样的呢?是不是在任何下都能互换 ...