System.out.println(‘1‘ + 2 + 3 + "ABC"); //54ABC System.out.println(‘1‘ + 0);//49 System.out.println(‘9‘ + 0);//57 System.out.println(‘A‘ + 0);//65 System.out.println(‘Z‘ + 0);//90 System.out.println(‘a‘ + 0);//97 System.out.println(‘z‘ + 0);//122
原文：https://www.cnblogs.com/hahajava/p/13749730.html