Java String之contains方法的使用详解

package api.api;
public class App1 {undefined
  public static void main(String[] args) {undefined
    String num = "WKCON190400111";
    if (num.contains("CON")) {undefined
      System.out.println(1);
    } else {undefined
      System.out.println(2);
    }
  }
}

String x=(1+(8*(9-6/2)/4)*2);
if(x.contains("("))
{
System.out.println("匹配成功");
}