java char值 总结

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