Question

JAVA中如何将字符串中的字符设置成变量的形式.

String sql = "select * from play where id = 1"

想写成
int x = 1;

String sql = "select * from play where id = x";

这样是不行的,我也知道,但是具体的怎么写呢

Answer 1

String x;
String sql = "select * from play where id ="+ x;

追问

x不能等于1 因为x不是String类型