How to get the name of the column returning from reslut set

for the below code how can i get the table B column names?
Thank you.
stm = con.createStatement();
rs = stm.executeQuery("select a.title, b.* from Tbl_Questions a, Tbl_Answers b where b.id=" + answerId +" and b.questionId=a.id");
if( rs.next() ) {
answer.setId(answerId);
answer.setQuestionId(rs.getString("b.questionId"));
answer.setQuestionTitle(rs.getString("a.title"));
answer.setTitle(rs.getString("b.title"));
answer.setInputType(rs.getString("b.inputtype"));
}

Column names may be output with meta data.
DatabaseMetaData metadata = null;
Class.forName("oracle.jdbc.driver.OracleDriver");
String url="jdbc:oracle:thin:@localhost:1521:ORCL";
Connection currentConnection = DriverManager.getConnection(url,
                     "oe", "");
metadata = currentConnection.getMetaData();
String[] names = {"TABLE"};
ResultSet tables = metadata.getTables(null,"%", "%", names);
while (tables.next()) {
String tableName = tables.getString("TABLE_NAME");
String tableSchema = tables.getString("TABLE_SCHEM");
String tableType = tables.getString("TABLE_TYPE");
System.out.println("Table Name:"+tableName+ " Table Schema: "+tableSchema+ " Table Type: "+tableType);
   ResultSet columns = metadata.getColumns(null, "%", tableName, "%");
while (columns.next()) {
String columnName = columns.getString("COLUMN_NAME");
String datatype = columns.getString("TYPE_NAME");
int datasize = columns.getInt("COLUMN_SIZE");
int nullable = columns.getInt("NULLABLE");
System.out.println("Column Name: "+columnName+ " Data Type: "+datatype+ " Data Size: "+datasize+" Nullable: "+nullable);
    }

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