[英]Splitting string into two separate
好吧,我的意思是,我创建了一个String类型的变量,然后在加载文件时,我必须将内容保存在一个变量中,在这种情况下,该变量是“ TextFromFile”,加载后,我想将其分为两个一个并保存在数组中,之后我只想在屏幕上显示两个单独的字符串。 那是个主意。
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package zadania1;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
public class Zadania1
{
public static void main(String[] args)
{
String TextFromFile = "";
Zadania1 zad = new Zadania1();
TextFromFile = zad.NacitajObsahZoSubora("C:\\Users\\Ivan\\Desktop\\test.txt");
String[] pole = TextFromFile.split("[ \\ ]");
System.out.println("Frist matrica " + pole[0] +" Second matrica: " + pole[1] +"");
}
public String NacitajObsahZoSubora(String fileName)
{
String text = "", tmp;
try
{
FileInputStream file = new FileInputStream(fileName);
InputStreamReader input = new InputStreamReader(file);
try (BufferedReader fromFile = new BufferedReader(input))
{
while((tmp = fromFile.readLine()) != null)
{
text = text + "\n" + tmp;
}
System.out.println("Obsah suboru:\n" + text);
}
}
catch(IOException e)
{
}
return text;
}
public void ZapisObsahDoSubora(String fileName, String writeText)
{
try
{
FileOutputStream file = new FileOutputStream(fileName);
OutputStreamWriter output = new OutputStreamWriter(file);
try (PrintWriter toFile = new PrintWriter(output))
{
toFile.println("" + writeText);
}
}
catch (IOException e)
{
}
}
}
只有这一部分向我展示数组超出了反弹范围:
String[] pole = TextFromFile.split("[ \\ ]");
System.out.println("Frist matrica " + pole[0] +" Second matrica: " + pole[1] +"");
错误:
线程“主”中的异常java.lang.ArrayIndexOutOfBoundsException:zadania1.Zadania1.main(Zadania1.java:24)为1
根据我从评论中了解的内容,假设您的输入形式为:
[1,2,3;4,5,6;][9,8;7,-6;50,61;]
您需要在拆分中使用另一个正则表达式,这涉及到一个回顾:
String input = "[1,2,3;4,5,6;][9,8;7,-6;50,61;]";
String[] pole = input.split("(?<=\\])");
System.out.println("Frist matrica " + pole[0] +" Second matrica: " + pole[1] +"");
// Output:
// Frist matrica [1,2,3;4,5,6;] Second matrica: [9,8;7,-6;50,61;]
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