java中如何从文本里读取数据封装到vector中
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解决时间 2021-01-29 11:42
- 提问者网友:兔牙战士
- 2021-01-28 20:06
java中如何从文本里读取数据封装到vector中
最佳答案
- 五星知识达人网友:孤老序
- 2021-01-28 20:24
import java.util.Vector;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.io.*;
public class Vect {
public static void main(String[] args) throws Exception {
Vector<String> vector = new Vector<String>();
BufferedReader br = new BufferedReader(new FileReader("123.txt"));
String str = null;
Pattern p = Pattern.compile("\\d+");
while ((str = br.readLine()) != null) {
Matcher m = p.matcher(str);
while (m.find()) {
vector.add(m.group());
}
}
System.out.println(vector);//测试vector是不是封装了从文件中读入的数据
}
}
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.io.*;
public class Vect {
public static void main(String[] args) throws Exception {
Vector<String> vector = new Vector<String>();
BufferedReader br = new BufferedReader(new FileReader("123.txt"));
String str = null;
Pattern p = Pattern.compile("\\d+");
while ((str = br.readLine()) != null) {
Matcher m = p.matcher(str);
while (m.find()) {
vector.add(m.group());
}
}
System.out.println(vector);//测试vector是不是封装了从文件中读入的数据
}
}
全部回答
- 1楼网友:舊物识亽
- 2021-01-28 21:33
java中使用for循环语句,将数据封装到vector,如下:
for循环遍历
Vector v=new Vector();
for(int i=0;i<v.size();i++){
System.out.println(v.get(i));
}
- 2楼网友:罪歌
- 2021-01-28 21:06
import java.util.Vector;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
import java.io.*;
public class Vect {
public static void main(String[] args) throws Exception {
Vector vector = new Vector();
BufferedReader br = new BufferedReader(new FileReader("123.txt"));
String str = null;
Pattern p = Pattern.compile("\\d+");
while ((str = br.readLine())
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