java – Mcreator (Minecraft Mod-making) Compile Error

im trying to make a tool pack but everytime i get the message

New Dep: net.minecraftforge:forge:1.15.2-31.2.0_mapped_snapshot_20200514-1.15.1

Task :compileJava FAILED
C:UsersMCreatorWorkspacestreesrcmainjavanetmcreatortreeitemObsidianAxeItem.java:43: error: illegal start of expression
new ItemStack(, (int)(1))
^
C:UsersMCreatorWorkspacestreesrcmainjavanetmcreatortreeitemObsidianHoeItem.java:43: error: illegal start of expression
new ItemStack(, (int)(1))
^
C:UsersMCreatorWorkspacestreesrcmainjavanetmcreatortreeitemObsidianPickaxeItem.java:43: error: illegal start of expression
new ItemStack(, (int)(1))
^
C:UserMCreatorWorkspacestreesrcmainjavanetmcreatortreeitemObsidianShovelItem.java:43: error: illegal start of expression
new ItemStack(, (int)(1))
^
C:UserMCreatorWorkspacestreesrcmainjavanetmcreatortreeitemObsidianSwordItem.java:43: error: illegal start of expression
new ItemStack(, (int)(1))
^
5 errors
FAILURE: Build failed with an exception.

  • What went wrong:
    Execution failed for task ‘:compileJava’.

Compilation failed; see the compiler error output for details.