Clean up some unused import warnings in the example jdbc code

src/interfaces/jdbc/example/Unicode.java

 package example;
 
-import java.io.*;
 import java.sql.*;
 import java.util.*;
 

src/interfaces/jdbc/example/basic.java

@@ -2,11 +2,10 @@ package example;
 
 import java.io.*;
 import java.sql.*;
-import java.text.*;
 
 /*
  *
- * $Id: basic.java,v 1.13 2002/09/06 21:23:05 momjian Exp $
+ * $Id: basic.java,v 1.14 2003/09/09 11:24:04 barry Exp $
  *
  * This example tests the basic components of the JDBC driver, and shows
  * how even the simplest of queries can be implemented.

src/interfaces/jdbc/example/datestyle.java

@@ -2,7 +2,6 @@ package example;
 
 import java.io.*;
 import java.sql.*;
-import java.text.*;
 
 /*
  * This example tests the various date styles that are available to postgresql.

src/interfaces/jdbc/example/metadata.java

@@ -2,7 +2,6 @@ package example;
 
 import java.io.*;
 import java.sql.*;
-import java.text.*;
 
 /*
  * This example application is not really an example. It actually performs

src/interfaces/jdbc/example/psql.java

@@ -2,7 +2,6 @@ package example;
 
 import java.io.*;
 import java.sql.*;
-import java.text.*;
 
 /*
  * This example application demonstrates some of the drivers other features

src/interfaces/jdbc/example/threadsafe.java

@@ -2,7 +2,6 @@ package example;
 
 import java.io.*;
 import java.sql.*;
-import java.text.*;
 
 // rare in user code, but we use the LargeObject API in this test
 import org.postgresql.largeobject.*;
@@ -106,7 +105,7 @@ public class threadsafe
 			// will yield as long as either of the children are still running
 			System.out.println("Waiting for threads to run");
 			while (thread1.isAlive() || thread2.isAlive() || thread3.isAlive())
-				thread0.yield();
+				Thread.yield();
 		}
 		finally
 		{

src/interfaces/jdbc/org/postgresql/test/jdbc2/ResultSetTest.java

@@ -4,7 +4,6 @@ import org.postgresql.test.TestUtil;
 import java.sql.Connection;
 import java.sql.ResultSet;
 import java.sql.Statement;
-import java.sql.SQLException;
 
 import junit.framework.TestCase;