Can anyone tell why my program hangs

[科峰 龙]

My codes are

=====================================
package com.enmoli.userservice;

import java.util.Date;
import java.util.UUID;
import java.util.zip.CRC32;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class CommonTest {

static Connection conn = null;

public static Connection getConnectionByJDBC() {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
try {
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/inter", "abc", "abc");
} catch (SQLException e) {
e.printStackTrace();
}
return conn;
}

public static void test() {
String sql = "SELECT c.uid, b.grade as grade, b.score as score, b.normal_image as image, b2.score as scoreUp,"
+ " (b2.score - c.old_rank_beauty) as shortScore, b2.normal_image as nextImage"
+ " from cust_user_count c"
+ " left join shall_admin_user_grade_def b on c.rank_beauty=b.grade and b.type=1 and b.gender=0"
+ " left join shall_admin_user_grade_def b2 on b2.score<= c.old_rank_beauty and b2.score_up> c.old_rank_beauty and b2.type=1 and b2.gender=0"
+ " where c.uid = 68";
getConnectionByJDBC();
try {
Statement stmt = conn.createStatement();

//my program hang on the following line
ResultSet rs = stmt.executeQuery(sql);
while (rs.next()) {
String username = rs.getString("username");
String password = rs.getString("password");
System.out.println(username + "" + password);
}
} catch (SQLException e) {
System.out.println(e.getMessage());
e.printStackTrace();
} finally {

try {
if (conn != null)
conn.close();
} catch (SQLException e) {
System.out.println(e.getMessage());
e.printStackTrace();
}
}
}

public static void main(String[] args) {
CommonTest testjdbc = new CommonTest();
testjdbc.test();
}

}


=================================================

if I run my sql in mysql workbeach, it report a error "Error Code: 1690. BIGINT UNSIGNED value is out of range in '(`inter`.`b2`.`score` - '638733439')'"


I want to know why jdbc hangs rather than exit with error message?

How can I fix my code to let the program continue to run even the sql has some errors?