{"id":120,"title":"java\u6d6e\u70b9\u7c7b\u578b","good":0,"bad":0,"hit":3004,"created_at":"2014-12-03 13:48:51","content":"<p>public class Test2_10 {<br\/>&nbsp;&nbsp; &nbsp;<br\/>&nbsp;&nbsp; &nbsp;public static void main(String args[]){<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;\/*<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * \u6d6e\u70b9\u7c7b\u578b\u7528\u4e8e\u8868\u793a\u5c0f\u6570\u7684\u6570\u636e\u7c7b\u578b<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * java\u6d6e\u70b9\u7c7b\u578b\u7528float\u548cdouble\u4e24\u79cd<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * java\u9ed8\u8ba4\u6d6e\u70b9\u7c7b\u578b\u8ba1\u7b97\u7684\u7ed3\u679c\u662fdouble\u7c7b\u578b\uff0c\u5b57\u9762\u91cf\u4e5f\u662fdouble\u7c7b\u578b<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * \u82e5\u8981\u7ed9float\u7c7b\u578b\u7684\u53d8\u91cf\u8d4b\u503c\uff0c\u5219\u8981\u5728\u5b57\u9762\u91cf\u540e\u9762\u52a0F\u6216f<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * \u4ee53.1415*(10^4)\u4e3a\u4f8b\uff1a3.1415\u4e3a\u5c3e\u6570\uff0c10\u4e3a\u57fa\u6570\uff0c4\u4e3a\u6307\u6570<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * float\u7c7b\u578b\u4e3a32\u4f4d\uff1a1\u4f4d\u7b26\u53f7\u4f4d\uff0c8\u4f4d\u6307\u6570\u4f4d\uff0c23\u4f4d\u5c3e\u6570\u4f4d\uff0c\u5373\u7cbe\u5ea6\u4e3a23\u4f4d\uff0c\u8d85\u8fc7\u88ab\u622a\u53d6<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * float\u5b58\u50a8\u8303\u56f4\u8f83int\u5927\uff0c\u4f46\u7cbe\u5ea6\u8f83int\u5c0f\uff0cint\u7684\u7cbe\u5ea6\u4e3a31\u4f4d<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * <br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * double\u7c7b\u578b\u517164\u4f4d\uff0c1\u4f4d\u7b26\u53f7\u4f4d\uff0c11\u4f4d\u6307\u6570\u4f4d\uff0c52\u4f4d\u5c3e\u6570\u4e3a<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * double\u5b58\u50a8\u8303\u56f4\u8f83long\u5927\uff0c\u4f46\u7cbe\u5ea6\u8f83long\u5c0f,long\u7684\u7cbe\u5ea6\u4e3a63\u4f4d<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * <br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; * \u6d6e\u70b9\u8fd0\u7b97\u5c31\u662f\u5b9e\u6570\u8fd0\u7b97\uff0c\u7531\u4e8e\u8ba1\u7b97\u673a\u53ea\u80fd\u5b58\u50a8\u6574\u6570\uff0c\u6240\u4ee5\u5b9e\u6570\u90fd\u662f\u7ea6\u6570\uff0c\u5bfc\u81f4\u6d6e\u70b9\u8fd0\u7b97\u5f88\u6162\u4e14\u4f1a\u6709\u8bef\u5dee<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; *\/<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;\/\/\u6d6e\u70b9\u8fd0\u7b97\u4ea7\u751f\u8bef\u5dee\u7684\u4f8b\u5b50<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;float a=2.4f;<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;float b=2f;<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;System.out.println(a-b);\/\/\u7ed3\u679c\uff1a0.4000001<br\/>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;<br\/>&nbsp;&nbsp; &nbsp;}<br\/>&nbsp;&nbsp; &nbsp;<br\/>}<\/p>"}