public class AboutStrings{
public static void main(String args[]){
String s1="hello";
String s2="hel";
String s3="lo";
String s4=s2+s3;
//to know the hash codes of s1,s4.
System.out.println(s1.hashCode());
System.out.println(s4.hashCode());
// these two s1 and s4 are having same hashcodes.
if(s1==s4){
System.out.println("s1 and s4 are same.");
}else
System.out.println("s1 and s4 are not same.");
}
}
Somebody told me that, == operator compares references of
the objects.
In the above example even though s1 and s4 are refering to
same object(having same hash codes),
it is printing s1 and s4 are not same.
Can anybody explain in detail why it is behaving like this?
Thanks in Advance
RavuriVinod
dear friends
I have made connection with SQLSERVER where the following
code is compiling properly but giving error at the runtime .
I think error in this line where i am sending the value
through string
Connection connection = DriverManager.getConnection
( "jdbc:microsoft:sqlserver://localhost:1433","sa","");
import java.sql.*;
//import mssqlserver.*;
public class TestSQLCON
{
public TestSQLCON() throws Exception
{
// Get connection
DriverManager.registerDriver(new
com.microsoft.jdbc.sqlserver.SQLServerDriver());
System.out.println();
System.out.println("Successfully connected one");
System.out.println();
Connection connection = DriverManager.getConnection
( "jdbc:microsoft:sqlserver://localhost:1433","sa","");
if (connection != null)
{
System.out.println();
System.out.println("Successfully connected");
System.out.println();
// Meta data
DatabaseMetaData meta = connection.getMetaData();
System.out.println("\nDriver Information");
System.out.println("Driver Name: " +
meta.getDriverName());
System.out.println("Driver Version: " +
meta.getDriverVersion());
System.out.println("\nDatabase Information ");
System.out.println("Database Name: " +
meta.getDatabaseProductName());
System.out.println("Database Version: "+
meta.getDatabaseProductVersion());
}
}
public static void main (String args[]) throws Exception
{
TestSQLCON test = new TestSQLCON();
}
}
so please help me
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