Java经典安全数组实现
转自：http://blog.csdn.net/zhangheliang2010/article/details/8484058
final class DataSources {
private int size;
private DataSource[] data = new DataSource[4];
final int size(){
return size;
}
final DataSource get(int idx){
if (idx >= size)
throw new IndexOutOfBoundsException("Index: "+idx+", Size: "+size);
return data[idx];
}
final void add(DataSource table){
if(size >= data.length ){
DataSource[] dataNew = new DataSource[size << 1];
System.arraycopy(data, 0, dataNew, 0, size);
data = dataNew;
}
data[size++] = table;
}
}
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