how to get error code from exception in java

We do Android development, see others application of some good features, is not very want to get the source code, for reference? Since Android is developed in Java, we can easily decompile the source code to the application. Let me briefly explain how it should be done.Specific steps:1. First change the apk file suffix

Import Java.io.bufferedreader;import Java.io.filenotfoundexception;import Java.io.ioexception;import Java.io.inputstreamreader;import Java.net.sockettimeoutexception;import Java.net.url;import Java.net.urlconnection;import Java.text.simpledateformat;import Java.util.arraylist;import Java.util.Calendar; Import Java.util.date;import java.util.hashmap;import Java.util.list;import Java.util.map;import Net.sf.json.jsonobject;public class Weather {String Cityid; URLConnection Connectiondata; StringBui

', ' m ', ' n ', ' o ', ' P ', ' Q ', ' R ', ' s ', ' t ', ' u ', ' V ', -' W ', ' x ', ' y ', ' z ', ' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ', ' 5 ', ' 6 ', ' 7 ', ' 8 ', -' 9 ' }; + - /*** Function: Generate color verification Code picture * parameter width to generate the picture, height of the parameter, parameter OS for the output stream of the page*/ + PublicString Getcertpic (intWidthintheight, outputstream os) { A at if(Width ) {

(). Get (+) + "s");System.out.println (Sb.tostring ());}}/****************************************************************************/Class Taskwithlock extends Task implements runnable{Private Final lock lock = new Reentrantlock ();@Overridepublic void Run () {try{Start lockingLock.lock ();DoSomething ();}finally{Release lockLock.unlock ();}}}/***************************************************************************/Class Taskwithsync extends Tas

{78 Private String ID;9 private String name;Ten private String identity;1112}-The above two Java classes, from the point of view, their effect is the same, compared with, it is clear that the use of Lombok is much more concise, especially in the case of the class of the property more,It also avoids the low-level errors in modifying the name of the field when you forget to modify the method name. Finally, it is important to remember to import the Lombo

These two days need to do something, need to crawl other people's web page some information. Finally, use Htmlparser to parse HTML. Read it directly from the code: First you need to note that the import package is: The package under import Org.htmlparser Copy Code code as follows: listtry{ Parser Parser = new Parser (HTMLSTR);//Initialize Parser,

Java with the tool class enough, download and install QQ, and then search the installation directory under the Loclist.xml fileHere is the code to parse the file, output as a bunch of SQL, you know, if you want the JSON objectThen change the Printnode.Importjavax.xml.parsers.documentbuilder;importjavax.xml.parsers.documentbuilderfactory;import org.w3c.dom.document;importorg.w3c.dom.node;importorg.w3c.dom.no

In your program, you need to throw an exception and then output the error message in the user interface.One scenario is to capture an exception when the final UI is displayed in the program, and then display the corresponding errormessage, and sometimes the program needs to customize the exception because it needs to t

Although traditional assertions can increase the number of checks on Java code, there are still a number of checks that cannot be completed. One way to handle this situation is to use temporal logic. Recall last month's article "assertions and temporal logic in Java programming", where temporal logic helps to provide more powerful assertions than the methods in t

When java accepts get requests sent from the android client, garbled code is used to solve the problem. This afternoon, I encountered a very common problem. However, after N times, I couldn't find an effective solution, A simple and effective method is developed.The implementation idea is as follows:: (1) Before the android client sends a

/**get up n hours on the hour of day *@paramDate *@return */ Public StaticString getlasthourtime (date date,intN) {Calendar CA=calendar.getinstance (); Ca.set (Calendar.minute,0); Ca.set (Calendar.second,0); SimpleDateFormat SDF=NewSimpleDateFormat ("Yyyymmddhhmmss"); Ca.set (Calendar.hour_of_day, Ca.get (calendar.hour_of_day)-N); Date=Ca.gettime (); returnSdf.format (date); } /**get the hourly h

" (compatible; MSIE 6.0; Windows NT 5.1; SV1) "); Establish the actual connection connection.connect (); Gets all response header fields Map Call Method: public static void Main (string[] args) { //Send GET request String s=httprequest.sendget ("http://localhost:6144/Home/ RequestString "," key=123v=456 "); System.out.println (s); Send POST request String sr=httprequest.sendpost ("http://localhost:6144/Ho