Java - find the first cause of an exception

Question

I need to check if an exception is caused by some database problem. I receive an Exception and check if its cause contains the \"ORA\" string and return that (something like

Answer 1

You could improve your code checking for SQLException

import java.sql.SQLException;

private static final String ORACLE = "ORA";

public String doHandle(Throwable t) {
    if (t.getClass().isAssignableFrom(SQLException.class)) {
    SQLException e = (SQLException) t;
    int errCode = e.getErrorCode();
    String state = e.getSQLState();
    String msg = e.getMessage();
    if (msg.contains(ORACLE)) {
        return msg;
        }
    } else {
        if (t.getCause() != null) {
            return this.doHandle(t.getCause());
            }
        }
    return "";
}

Also, I think in Oracle "errCode" contains the number associated to ORA-nnnn