多态的运用 实现java 数据类型判断
package javaBasic;http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gif/** *//**
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * 用多态实现数据类型的判断
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif *
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * @author <a href="mailto:jiangtuanming@geong.com">jiangtuanming</a><br>
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * or <a href="mailto:xiao_jiang51@163.com">蒋团明</a>
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * @version 1.0
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedBlock.gifpublic class Polymorphism ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private final static String INT_TYPE = "int";
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http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private final static String LONG_TYPE = "long";
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http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private final static String DOUBLE_TYPE = "double";
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http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private final static String FLOAT_TYPE = "float";
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http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private final static String CHAR_TYPE = "char";
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http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private final static String BYTE_TYPE = "byte";
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http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private final static String SHORT_TYPE = "short";
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http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif private final static String BOOLAEN_TYPE = "boolean";
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(int i) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return INT_TYPE;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(long l) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return LONG_TYPE;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(double d) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return DOUBLE_TYPE;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(float f) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return FLOAT_TYPE;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(char c) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return CHAR_TYPE;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(byte by) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return BYTE_TYPE;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(short s) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return SHORT_TYPE;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(boolean bo) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return BOOLAEN_TYPE;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif /** *//**
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * ie:javaBasic.Polymorphism@de6ced to:javaBasic.Polymorphism
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif *
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * @param obj
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * @return
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static String getType(Object obj) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif return obj != null ? obj.toString().split("@")[0] : null;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif /** *//**
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * test
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif *
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif * @param args
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif */
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockStart.gifhttp://images.csdn.net/syntaxhighlighting/OutliningIndicators/ContractedSubBlock.gif public static void main(String[] args) ...{
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif int i = 1;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif double d = 1.8;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif long l = 76;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif short s = 1;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif char c = ',';
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif float f = 1.1f;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif boolean bo = false;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif byte bt = 1;
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif Polymorphism poly = new Polymorphism();
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(i));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(l));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(d));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(s));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(c));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(f));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(bo));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(bt));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/InBlock.gif System.out.println(Polymorphism.getType(poly));
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedSubBlockEnd.gif }
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockEnd.gif}
http://images.csdn.net/syntaxhighlighting/OutliningIndicators/None.gif
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
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