yes there's a bit of java in my nvim config why do you ask?

lua/conf/plugins/harpoon.lua

@@ -0,0 +1,31 @@
+local misc = require('core.misc')
+local map = misc.map
+
+return { 'ThePrimeagen/harpoon',
+  disable = vim.version().minor < 8,
+  branch = 'harpoon2',
+  requires = 'nvim-lua/plenary.nvim',
+  function()
+    local harpoon = require("harpoon")
+
+    harpoon:setup()
+
+    map("n", "<leader>a", function()
+      harpoon:list():add()
+      vim.notify("added "..vim.fn.expand("%:t").." to quickmarks", vim.log.levels.INFO, {
+        title = misc.appid,
+      })
+    end, { desc = "add current file to quickmarks" })
+
+    map("n", "<C-e>", function() harpoon.ui:toggle_quick_menu(harpoon:list()) end)
+
+    map("n", "<C-h>", function() harpoon:list():select(1) end)
+    map("n", "<C-t>", function() harpoon:list():select(2) end)
+    map("n", "<C-n>", function() harpoon:list():select(3) end)
+    map("n", "<C-s>", function() harpoon:list():select(4) end)
+
+    -- Toggle previous & next buffers stored within Harpoon list
+    map("n", "<C-S-P>", function() harpoon:list():prev() end)
+    map("n", "<C-S-N>", function() harpoon:list():next() end)
+  end
+}