/**
* 本类是JDK源码中的示例,思维很巧
* @author TANGHAI
*
*/
class IntegerCache {
private IntegerCache() {
}
static final Integer cache[] = new Integer[-(-128) + 127 + 1];
static {
for (int i = 0; i < cache.length; i++)
cache[i] = new Integer(i - 128);
}
public static void main(String[] args) {
System.out.println(cache.length);
for (Integer i : cache) {
System.out.println(i);
}
}
}