illusion社安卓游戏:帮忙看一下我用JAVA写的求各数据类型的最值算法

//各数据类型的最值

public class d {
public static void main(String[] args) {
int INT_MAX = (int)Float.MAX_VALUE,INT_MIN = (int)Float.NEGATIVE_INFINITY;
short SHORT_MAX = (short)Float.POSITIVE_INFINITY,SHORT_MIN = (short)Float.NEGATIVE_INFINITY;
long LONG_MAX = (long)Float.MAX_VALUE,LONG_MIN = (long)Float.NEGATIVE_INFINITY;

System.out.println("\nSHORT-MAX = " + SHORT_MAX + "\nSHORT-MIN = " + SHORT_MIN);

System.out.println("\nINT-MAX = " + INT_MAX + "\nINT-MIN = " + INT_MIN);

System.out.println("\nLONG-MAX = " + LONG_MAX + "\nLONG-MIN = " + LONG_MIN);

System.out.println("\nFLOAT-MAX = " + Float.MAX_VALUE + "\nFLOAT-MIN = " + Float.MIN_VALUE);

System.out.println("\nDOUBLE-MAX = " + Double.MAX_VALUE + "\nDOUBLE-MIN = " + Double.MIN_VALUE);

}
}

1.运行的时候那个short的值是-1,0。无论我怎么改也得不到正确的答案。

2.浮点数中最大值是相符的，但最小值怎么就只保留了两位有效数字？这是怎么回事呢？

我实在是搞不明白，是不是我安装JDK包（1.4.2_11）的问题，还是怎么搞的。
还有就是这个问题能不能用位运算来解决呢？

谢谢！