在无参构造函数创建ArrayList时其实创建的是一个容量为0的数组(DEFAULTCAPACITY_EMPTY_ELEMENTDATA 标识),只有在第一次新增元素时才会被扩容为10
publicArrayList(){this.elementData = DEFAULTCAPACITY_EMPTY_ELEMENTDATA; } 这时可以知道,在构造ArrayList的时候,如果使用的是有参构造而且传入的容量为0,使用的便是EMPTY_ELEMENTDATA。 但是如果使用的是无参构造,使用的便是DEFAULTCAPACITY_EMPTY_ELEMENTDATA; ...
排错:java获取mysql数据库表字段,得到的是erialVersionUID,DEFAULT_CAPACITY,EMPTY_ELEMENTDATA...,程序员大本营,技术文章内容聚合第一站。
核心代码:如果是默认初始化空容量会走 if (elementData == DEFAULTCAPACITY_EMPTY_ELEMENTDATA) { minCapacity = Math.max(DEFAULT_CAPACITY, minCapacity); }这段代码,接下来基于默认初始化大小10扩容,依次是10,15,22,33这种1.5倍数扩容。如果List<String>list = new ArrayList<>(0);那就是基于你设置的大小0开...
subExpResults = new ArrayList<Boolean[]>(); subExpResult = new Boolean[1]; schema = null; } 代码示例来源:origin: com.linkedin.datafu/datafu @Override public void cleanup() { seen.clear(); outputBag = BagFactory.getInstance().newDefaultBag(); } 代码示例来源:origin: com.linkedin.datafu...
privateMap<String, Double> mkSupervisorCapacities(Map<String, Object> conf) {Map<String, Double> ret =newHashMap<String, Double>();// Put in legacy valuesDouble mem = ObjectReader.getDouble(conf.get(Config.SUPERVISOR_MEMORY_CAPACITY_MB),4096.0);ret.put(Config.SUPERVISOR_MEMORY_CAPACITY_MB, ...
In the double click handler, do something like: string filename = System.IO.Path.GetTempFileNameWithoutExtension() + extensionFromDatabase; // Create C:\path\to\myFile.pdf, etc... // Write byte content from database to filename System.Diagnostics.Process.Start(filename); // this will ...
if (orig instanceof Queue) { return createSimilarQueue((Queue<T>) orig); } return new ArrayList<T>(newCapacity); } 代码示例来源:origin: org.codehaus.groovy/groovy /** * get value from char[] using normalized index */ public static char cArrayGet(char[] a, int i) { try { return...
if(originstanceofQueue){ returncreateSimilarQueue((Queue<T>)orig); } returnnewArrayList<T>(newCapacity); } 代码示例来源:origin: org.codehaus.groovy/groovy /** * get value from char[] using normalized index */ publicstaticcharcArrayGet(char[]a,inti){ ...
i recently changed the default icon in the control box to a custom one. However, i didn't like the custom one and want to go back, but i can't figure out how. The studio doesn't let me clear out the Icon value, i have to chose an existing icon to change. Does anyone know how...