我们如何动态分配和增长数组

您可以执行以下操作：

String [] wordList;int wordCount = 0;int occurrence = 1;int arraySize = 100;int arrayGrowth = 50;wordList = new String[arraySize];while ((strLine = br.readLine()) != null)   {     // Store the content into an array     Scanner s = new Scanner(strLine);     while(s.hasNext()) {         if (wordList.length == wordCount) {   // expand list   wordList = Arrays.copyOf(wordList, wordList.length + arrayGrowth);         }         wordList[wordCount] = s.next();         wordCount++;     } }

使用

java.util.Arrays.copyOf(String[])

if (wordList.length == wordCount) {    String[] temp = new String[wordList.length + arrayGrowth];    System.arraycopy(wordList, 0, temp, 0, wordList.length);    wordList = temp;}

除了它是一行代码而不是三行代码。:)