对于 biziclop:
类 biziclop {
public static void main(String[] args) { System.out.println(new Integer(5) == new Integer(5)); System.out.println(new Integer(500) == new Integer(500)); System.out.println(Integer.valueOf(5) == Integer.valueOf(5)); System.out.println(Integer.valueOf(500) == Integer.valueOf(500)); }
}
结果是:
C:\Documents and Settings\glow\My Documents>java biziclop false false true false C:\Documents and Settings\glow\My Documents>
这是为什么?