Java中的类型包容器及其成员函数

• 共有的几个成员函数

1. public ClassType
   例：Integer i=new Integer(1);
2. public type typeValue()
   例：float x=flt.floatValue();
3. public String toString()
   例：System.out.print(i.toString());
4. public boolean equals(Object obj)
   例：Integer j=new Integer(1);
   boolean bool=j.equals(i);

• Boolean类

1. public static boolean getBoolean(String name)

• Character类

1. public static boolean isLowerCase(char ch)
2. public static boolean isUpperCase(char ch)
3. public static int digit(char ch,int radix)
4. public static boolean isDigit(char ch)
5. public static char forDigit(int digit,int radix)
6. public static char toLowerCase(char ch)
7. public static char toUpperCase(char ch)

• Number类

1. public int intValue()
2. public long longValue()
3. public float floatValue()
4. public double doubleValue()

• Integer类

1. public static int parseInt(String s,int radix)
2. public static int parseInt(String s)
3. public static Integer getInteger(String name)
4. public static Integer getInteger(String name,int val)
5. public static Integer getInteger(String name,Integer val)

• Float类

1. public boolean isInifite()
2. public static isInifite(float v)
3. public static int floatToIntBits(float value)
4. public static float intBitsToFloat(int value)
   例：Integer i=new Integer(1);