英文:
How to split string by comma and newline (\n) in Java?
问题
String string = "New York,USA,1000\n" +"City,World,2000\n";String[] newline = string.split("\n");String[] result = new String[1000]; // It seems like you intended to initialize an array, not a stringfor (int i = 0; i < newline.length; i++) {result = newline[i].split(",");// Now you can access the elements of 'result' array for further processing}
英文:
So I have this string :
"New York,USA,1000\n" +
"City,World,2000\n";
I need to split it first by newline and then by comma, so at the end I get an array of strings that is like this: New York has index 0, USA index 1, 1000 index 2, World index 4 and so on..I tried using
String[] newline = string.split("\n") and then declaring a new array of strings called result ( giving it 1000 characters randomly ) and making a for loop like this:
String[] result = new String[1000];for (String s : newline){result=s.split(",");}
But it doesn't work properly. Any help, please?
答案1
得分: 1
不同的操作系统有不同的换行符：
请查阅 https://en.wikipedia.org/wiki/Newline
-
UNIX或Mac：\r
-
Windows：\r\n
String[] lines = text.split("\\r?\\n");for (String line : lines) {System.out.println("line : " + line);String[] words = line.split(",");System.out.println("words : " + words);}
英文:
Different operating system has a different new line
Please check https://en.wikipedia.org/wiki/Newline
-
UNIX or Mac \r
-
Windows \r\n
String[] lines = text.split("\\r?\\n");for (String line : lines) {System.out.println("line : " + line);String[] words = line.split(",");System.out.println("words : " + words);}
答案2
得分: 1
如果您正在使用Java 8或更高版本，请尝试类似以下的代码：String str = "New York,USA,1000\n" + "City,World,2000\n";String[] result = Pattern.compile("\n").splitAsStream(str).map(s -> s.split(",")).flatMap(Arrays::stream).toArray(String[]::new);
英文:
If you are using java 8 or higher try try something like:
String str = "New York,USA,1000\n" + "City,World,2000\n";String[] result = Pattern.compile("\n").splitAsStream(str).map(s -> s.split(",")).flatMap(Arrays::stream).toArray(String[]::new);
答案3
得分: 1
public class Test {public static void main(String[] args) {String string = "New York,USA,1000\n" + "City,World,2000\n";String[] newline = string.split("\n");String[] result = new String[1000];int index = 0;for (String s : newline) {for (String t : s.split(",")) {result[index++] = t;}}for (int i = 0; i < index; i++) {System.out.print(result[i] + " ");}}}/*output:New York USA 1000 City World 2000*/
英文:
public class Test {public static void main(String[] args) {String string = "New York,USA,1000\n" + "City,World,2000\n";String[] newline = string.split("\n");String[] result = new String[1000];//first loopresult = newline[0].split(",");System.out.println(Arrays.toString(result));//second loopresult = newline[1].split(",");System.out.println(Arrays.toString(result));}}/*output:[New York, USA, 1000][City, World, 2000]*/
result would be overrided instead of append.
public class Test {public static void main(String[] args) {String string = "New York,USA,1000\n" + "City,World,2000\n";String[] newline = string.split("\n");String[] result = new String[1000];int index = 0;for (String s : newline) {for (String t : s.split(",")) {result[index++] = t;}}for (int i = 0; i < index; i++) {System.out.print(result[i] + " ");}}}/*output:New York USA 1000 City World 2000*/
答案4
得分: 0
如果我理解正确：import restringobject = "New York,USA,1000\n" + "City,World,2000\n"emptylist = []for str_obj in stringobject.splitlines():o = str_obj.split(sep=",")emptylist.append(o)print(emptylist)[['New York', 'USA', '1000'], ['City', 'World', '2000']]可以访问的嵌套列表：print(emptylist[0][0])'New York'
英文:
If I get you correctly:
import restringobject = "New York,USA,1000\n" + "City,World,2000\n"emptylist = []for str_obj in stringobject.splitlines():o = str_obj.split(sep=",")emptylist.append(o)print(emptylist)[['New York', 'USA', '1000'], ['City', 'World', '2000']]
Which is a list of list and can be accessed:
print(emptylist[0][0])'New York'
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