多态的运用 实现java 数据类型判断

package javaBasic;

/** *//**
 * 用多态实现数据类型的判断
 * 
 * @author <a href="mailto:[email protected]">jiangtuanming</a><br>
 *         or <a href="mailto:[email protected]">蒋团明</a>
 * @version 1.0
 */
public class Polymorphism ...{
    private final static String INT_TYPE = "int";

    private final static String LONG_TYPE = "long";

    private final static String DOUBLE_TYPE = "double";

    private final static String FLOAT_TYPE = "float";

    private final static String CHAR_TYPE = "char";

    private final static String BYTE_TYPE = "byte";

    private final static String SHORT_TYPE = "short";

    private final static String BOOLAEN_TYPE = "boolean";

    public static String getType(int i) ...{
        return INT_TYPE;
    }

    public static String getType(long l) ...{
        return LONG_TYPE;
    }

    public static String getType(double d) ...{
        return DOUBLE_TYPE;
    }

    public static String getType(float f) ...{
        return FLOAT_TYPE;
    }

    public static String getType(char c) ...{
        return CHAR_TYPE;
    }

    public static String getType(byte by) ...{
        return BYTE_TYPE;
    }

    public static String getType(short s) ...{
        return SHORT_TYPE;
    }

    public static String getType(boolean bo) ...{
        return BOOLAEN_TYPE;
    }

    /** *//**
     * ie:javaBasic.Polymorphism@de6ced to:javaBasic.Polymorphism
     * 
     * @param obj
     * @return
     */
    public static String getType(Object obj) ...{
        return obj != null ? obj.toString().split("@")[0] : null;
    }

    /** *//**
     * test
     * 
     * @param args
     */
    public static void main(String[] args) ...{
        int i = 1;
        double d = 1.8;
        long l = 76;
        short s = 1;
        char c = ',';
        float f = 1.1f;
        boolean bo = false;
        byte bt = 1;
        Polymorphism poly = new Polymorphism();
        System.out.println(Polymorphism.getType(i));
        System.out.println(Polymorphism.getType(l));
        System.out.println(Polymorphism.getType(d));
        System.out.println(Polymorphism.getType(s));
        System.out.println(Polymorphism.getType(c));
        System.out.println(Polymorphism.getType(f));
        System.out.println(Polymorphism.getType(bo));
        System.out.println(Polymorphism.getType(bt));
        System.out.println(Polymorphism.getType(poly));
    }
}

 

输出：

int
long
double
short
char
float
boolean
byte
javaBasic.Polymorphism

 

转自：http://blog.csdn.net/xiao_jiang51/archive/2008/03/21/2202720.aspx