java中字符串类型与其它类型（整形，浮点型，字符型）的区别 java中怎么将浮点型变成整型
java\u4e2d\u5b57\u7b26\u4e32\u7c7b\u578b\u4e0e\u5176\u5b83\u7c7b\u578b\uff08\u6574\u5f62\uff0c\u6d6e\u70b9\u578b\uff0c\u5b57\u7b26\u578b\uff09\u7684\u533a\u522bjava\u4e2d\uff0c\u5b57\u7b26\u4e32\u7c7b\uff08String\uff09\u662f\u4e00\u4e2a\u7c7b\uff0c\u4ed6\u6709\u5c5e\u6027\uff0c\u6709\u65b9\u6cd5\uff0c\u6240\u4ee5\u4ed6\u53ef\u4ee5\u6307\u5411NULL,
\u800c\uff08\u6574\u5f62\uff08int\uff09\uff0c\u6d6e\u70b9\u578b\uff08float\uff09\uff0c\u5b57\u7b26\u578b\uff08char\uff09\uff09\u4ed6\u4eec\u53ea\u662f\u4e00\u4e2a\u6570\u503c\uff0c
\u5219\u4e0d\u53ef\u4ee5\u4e3aNULL\uff0c
\u5b57\u7b26\u4e32\u7c7b\uff08String\uff09\u8fd8\u6709\u4e00\u70b9\u7279\u522b\u7684\u5730\u65b9\uff0c\u90a3\u5c31\u662f\u4ed6\u7684\u503c\u6216\u8005\u8bf4\u662f\u5185\u5bb9\u4e0d\u53ef\u4ee5\u88ab\u6539\u53d8\uff0c\u4f8b\u5982\u6211\u4eec\u5728\u4f7f\u7528replace\uff0cconcat\u8fd9\u4e9b\u65b9\u6cd5\u662f\uff0c\u4ed6\u5e76\u6ca1\u6709\u539f\u6765\u7684\u5bf9\u8c61\uff0c\u800c\u662f\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 String \u5bf9\u8c61\u8fd4\u56de\u6765\u3002
\u4e00
float a=1.1f;//\u5b9a\u4e49\u4e00\u4e2a\u6d6e\u70b9\u53d8\u91cfa
int b = (int)a;//\u8fd9\u91cc\u4f7f\u7528(int)\u65b9\u5f0f\u5bf9float\u8fdb\u884c\u5f3a\u8f6c\uff0c\u7ed3\u679c\u4e3a1
\u4e8c
float a = 1.1f;//\u5b9a\u4e49\u4e00\u4e2a\u6d6e\u70b9\u53d8\u91cfa
String str = String.valueOf(a);//\u6d6e\u70b9\u53d8\u91cfa\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32str
int idx = str.lastIndexOf(".");//\u67e5\u627e\u5c0f\u6570\u70b9\u7684\u4f4d\u7f6e
String strNum = str.substring(0,idx);//\u622a\u53d6\u4ece\u5b57\u7b26\u4e32\u5f00\u59cb\u5230\u5c0f\u6570\u70b9\u4f4d\u7f6e\u7684\u5b57\u7b26\u4e32\uff0c\u5c31\u662f\u6574\u6570\u90e8\u5206
int num = Integer.valueOf(strNum);//\u628a\u6574\u6570\u90e8\u5206\u901a\u8fc7Integer.valueof\u65b9\u6cd5\u8f6c\u6362\u4e3a\u6570\u5b57
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