java中怎么将字符串中的数字取出来 JAVA怎样快速把字符串里面的数字取出来
java\u4e2d\u600e\u4e48\u80fd\u628a\u5b57\u7b26\u4e32\u4e2d\u7684\u6570\u5b57\u53d6\u51fa\u6765?\u5b9e\u73b0\u4f60\u7239\u529f\u80fd\uff0c\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u5904\u7406\u9009\u62e9\u5b57\u7b26\u7684\u95ee\u9898
import java.util.Scanner;
//java.util.Scanner\u7684\u4f7f\u7528
public class h
{
public static void main(String args[])
{
Scanner input = new Scanner(System.in);
System.out.println("\u8bf7\u8f93\u5165\u5b57\u7b26\uff1a");
while (input.hasNext()) {
String a = input.next();
//\u628a\u5b57\u7b26\u4e32\u4e2d\u7684\u975e\u6570\u5b57\u5168\u90e8\u66ff\u6362\u4e3a"" \u6253\u5370
System.out.println(a.replaceAll("\\D",""));
}
input.close();
}
}
\u5982\u679c\u5bf9\u60a8\u6709\u5e2e\u52a9\uff0c\u8bf7\u8bb0\u5f97\u91c7\u7eb3\u4e3a\u6ee1\u610f\u7b54\u6848\uff0c\u8c22\u8c22\uff01\u795d\u60a8\u751f\u6d3b\u6109\u5feb\uff01
vaela
char[] charArray=date.toCharArray();
//\u8fd9\u662f\u65b9\u6cd5\u4e00 \u83b7\u5f97\u56fa\u5b9a\u4f4d\u7f6e\u4e0a\u7684\u6570\u5b57\uff0c\u56e0\u4e3a\u6211\u770b\u4f60\u8fd9\u4e2a\u6570\u5b57\u662f\u5728\u56fa\u5b9a\u4f4d\u7f6e\u4e0a\u7684\uff0c\u6240\u4ee5\u8bba\u901f\u5ea6\u8fd9\u4e2a\u662f\u6700\u5feb\u7684\u6ca1\u6709\u5224\u65ad\u76f4\u63a5\u83b7\u53d6
String newDate=charArray[0]+charArray[1]+charArray[2]+charArray[3]+charArray[5]+charArray[6]+charArray[8]+charArray[9];
\u65b9\u6cd5\u4e8c\uff1a
\u5bf9charArray\u8fdb\u884c\u904d\u5386\uff0c\u5982\u679c\u662f\u6570\u5b57\u5c31\u52a0\u5230\u65b0\u7684\u5b57\u7b26\u4e32\u7684\u5c3e\u5df4\u4e0a\u3002\u8fd9\u79cd\u9700\u8981\u5224\u65ad\u5f88\u591a\u6b21\uff0c\u901f\u5ea6\u6ca1\u90a3\u4e48\u5feb\u3002
\u65b9\u6cd5\u4e09\uff1a\u4f60\u53ef\u4ee5\u770b\u770b\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u65b9\u6cd5\u3002
\u65b9\u6cd5\u56db\uff1a\u9006\u5411\u601d\u7ef4\uff0c\u5982\u679c\u662f"-"\u6216\u8005\u662f" "," : "\u5c31\u8fc7\u6ee4\u6389
\u6211\u8bf4\u7684\u90fd\u662f\u539f\u7406\uff0c\u4ed6\u4eec\u8bf4\u7684\u90fd\u662f\u65b9\u6cd5\u3002\u4f46\u662f\u6700\u5feb\u7684\u80af\u5b9a\u662f\u6211\u7684\u7b2c\u4e00\u4e2a\u65b9\u6cd5\u3002\u522b\u4eba\u7684\u548c\u6211\u7684\u65b9\u6cd5\u4e8c\u548c\u56db\u7c7b\u4f3c\u3002
public class 取数字
{
public static void main(String[] args)
{
System.out.println("
==========将字符串中的数字取出来==========
");
init();
}//初始化!
private static void init()
{
//分割!
String[] s="今天是2017年09月01日".split("\\D+");
//打印分割的!
for (int i=0;i<s.length ;i++ )
{
System.out.print(s[i]+" ");
}
System.out.println();
}
}
用正则表达式将非数字的都替换成空字符就可以了
String path="2017年3月4日";
path=path.replaceAll("\\D+", "");
System.out.println(path);
输出：201734
可以用正则表达式匹配数字
split（“\\D+”）
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