Environment env2 = new Environment();
env2.setParameter( "param1", "val1" );
env2.setParameter( "param2", "value2" );
env2.setParameter( "param3", "value3" );
env2.lockEnvironment( true );
env2.setParameter( "param1", "value1" );
env2.setParameter( "param4", "value4" );
if( ! env2.getParameter( "param1" ).equals( "value1" ) ) System.err.printf( "test2: error 1%n" );
if( ! env2.getParameter( "param2" ).equals( "value2" ) ) System.err.printf( "test2: error 2%n" );