for iterator

Run: For (iterator it = O. getsons (). iterator (); it. hasnext ();){ R = (knowledgenode) it. Next (); It. Remove (); // if it is changed to O. getsons (). Remove (r);, the concurrentmodificationexception will be thrown. } An exception occurred. It

Poiexcelutils. Java: Package COM. saicfc. pmpf. internal. manage. utils; import Java. io. file; import Java. io. fileoutputstream; import Java. io. ioexception; import Java. util. calendar; import Java. util. iterator; import Java. util.

Dom4j is a Java xmlapi, similar to JDOM, used to read and write XML files. Dom4j is a very good javaxmlapi with excellent performance, powerful functionality and extreme ease of use features. Dom4j is an easy-to-use and open-source library for XML,

Import Dom4j.jar PackageThe package needs you to download.　　Creating an XML fileXMLWriter writer = null;//declares an object that writes XMLOutputFormat format =Outputformat.createprettyprint ();Format.setencoding ("Utf-8");//Set the encoding format

Generate and download Txt files in Java Package com. saicfc. pmpf. internal. manage. utils; import java. io. file; import java. io. fileWriter; import java. io. IOException; import java. util. iterator; import java. util. linkedHashMap; import java.

Generate and download Ecxel files in java (public) /*** Shanghai Automotive Group Financial Co., Ltd. * Copyright (c) 1994-2014 All RightsReserved. */package com. saicfc. pmpf. internal. manage. utils; import java. io. file; import java. io.

List mapping tableA list is an element that a Java collection stores in a sequence and allows repeating elements. Users of this interface can accurately control the insertion of each element in the list. Users can access elements through their

A single child node object is obtained under the parent node.Element memberelm=root.element ("member"); "Member" is a section roll call Gets the parent node to traverse all child nodes named "member". List nodes = rootelm.elements ("member");for

The JDK dynamic proxy is to proxy a class, the proxy class must implement at least one interface, and only the methods in the interface can be represented. JDK implementation of dynamic Proxy is generally divided into three steps: 1. writing

The Java.util package contains a series of important collection classes. This article will start with the analysis of the source, in-depth study of the internal structure of a collection class, as well as traversing the collection of iterative mode

Hashcode () and Equals () method detailed1. What are the characteristics of the Equals () method of the object class?A) reflexivity (reflexive): X.equals (x) should return Trueb) symmetry (symmetric): X.equals (y) is true, then y.equals (x) is also

Features of 1list:list elements!     How to traverse the list collection: while-iterator traversal for-iterator traversal foreach-Iteration traversal for-get traversal (only list can be, Set,map can not) Orderly and repeatable, because the

Dom4j is an open source XML parsing package produced by dom4j.org. Its website defines it as follows: Dom4j is an easy to use, open source library for working with XML, XPath andXSLT on the Java platform using the Java collections framework and

Package Com.ibs.auth.controller;Import java.io.UnsupportedEncodingException;Import Java.util.Date;Import Java.util.HashMap;Import Java.util.Iterator;Import Java.util.Map;Import com.whalin.memcached.MemCachedClient;Import

/** * Shanghai Automotive Group Finance Co., Ltd. * Copyright (c) 1994-2014 all rightsreserved. */package Com.saicfc.pmpf.internal.manage.utils;import Java.io.file;import Java.io.ioexception;import Java.util.iterator;import

This article mainly describes the Java generation of CSV file method, the implementation of the following steps: 1, new Csvutils.java file: Package com.saicfc.pmpf.internal.manage.utils; Import Java.io.BufferedWriter; Import

Execution: for (iterator it = o.getsons (). iterator (); It.hasnext ();) { R = (Knowledgenode) it.next (); It.remove ();  If replaced by O.getsons (). Remove (R); Will throw out the abnormal concurrentmodificationexception. There is an exception,

I've been working on an efficient platform for a while, and actually realizing that I'm going to make a simple framework when I've done what I think is a version of the interface, start to think I want to do is a configurable home page display, but

We learn hibernate query is to know HQL support condition query, divided into many aspects, here we have a specific hibernate query with examples to explain, hope to help the reader's study. 1. Support string method parameter pass query: Example:

This code was also my online search, but unfortunately, the data source to the list, unable to return to the foreground, the list to JSON error, I show the correct code1.Package Com.labci.javamail.test;import Java.util.arraylist;import