Java中introduce方法 Java API introduce[转贴]

Java类库由以下几个包组成：

java.lang

java.io

java.util

java.awt

java.applet

java基础类库在java.lang包中：

Object class

method:

1.protected Object clone()

2.public boolean equals(Object obj)

3.public final class getClass()

4.protected void finalize()

5.public String toString()

6.public final void notify()

Math class

method:

1.public static double abs(double d)

2.public static double exp(double d)求e的d次幂

3.public static double floor(double d)求不大于d的最大整数

4.public static double log(doulble d)求d 的自然对数

5.public static double max(double d1,double d2)

6.public static double min(double d1,double d2)

7.public static double pow(double d1,double d2)d1的d2次方

8.public static double random()获取0~1中的随机数

9.public static double rint