Super simple chrome extension to banish old javadoc from the web.

JavadocRedirect.js

chrome.tabs.onUpdated.addListener( function (tabId, changeInfo, tab) {
console.log("Tab changed");
  if(changeInfo.status == 'complete'){
  console.log("Tab changed 2");
    chrome.tabs.getSelected(null,function(tab){
      if(tab){
        console.log("Tab defined");
        var current = tab.url;
        console.log(current);
        var regex = /(https?:\/\/docs\.oracle\.com\/javase\/)(.*)(\/docs\/api.*)/i;
        if(regex.test(current)){
          console.log("Matched URL");
          var url = regex.exec(current);
          var newurl = url[1]+"8"+url[3];
          if(url[2]!="8"&&url[3])
            chrome.tabs.update(tab.id, {url: newurl});
        }
      }
    });
  }
});

manifest.json

{
  "manifest_version": 2,
  "name": "Javadoc Redirect",
  "description": "Redirect old javadoc to new javadoc",
  "version": "1.0",

  "background": {
    "scripts": ["JavadocRedirect.js"]
  },

  "permissions": [
    "tabs"
  ]
}