How do I acces to glass panes and strings? I can't find them neither in blocks nor in items.

In Block, there are 3 variables called thinGlass, tripWireSource, and tripWire.

public static final Block thinGlass = (new BlockPane(102, "glass", "glass_pane_top", Material.glass, false)).setHardness(0.3F).setStepSound(soundGlassFootstep).setUnlocalizedName("thinGlass");
public static final BlockTripWireSource tripWireSource = (BlockTripWireSource)(new BlockTripWireSource(131)).setUnlocalizedName("tripWireSource").func_111022_d("trip_wire_source");
public static final Block tripWire = (new BlockTripWire(132)).setUnlocalizedName("tripWire").func_111022_d("trip_wire");

 

In Item, there is a variable called silk.

public static Item silk = (new ItemReed(31, Block.tripWire)).setUnlocalizedName("string").setCreativeTab(CreativeTabs.tabMaterials).func_111206_d("string");