java - How to remove the carriage return from string while pasting content to Excel file

Question

I have a problem while pasting my contents (or text) generated by Java code into excel. The problem is that my Java code generates a String with multiple lines, i.e. with line breaks ( ) included. When I try to copy this content and paste it into an Excel file, I am getting a multiline text with a square box symbol. I came to know that Windows uses for line breaks and not just . I tried to replace my with and paste the generated text, but I am getting the same square boxes in my Excel file. Here is my sample code:

      String   myString = "a1
b1";
      String   tmpString =myString.replace("
","
");
      System.out.println( "Original = " +"""+myString+""");
      System.out.println( "Result   = " +"""+tmpString+""");

I have used the " " to wrap the text. When I tried to paste tmpstring in Excel, I got the square box. How can I remove the boxes with multiple lines in my cell?

Answer 1

Do you want the carriage return / newline, or don't you? Your title says that you don't, your code is explicitly adding carriage returns when the string has a newline. If you want to get rid of both, use String.replaceAll(), which takes a regex:

public static void main(String[] argv)
throws Exception
{
    String s1 = "this
is a test";
    String s2 = s1.replaceAll("[

]", "");
    System.out.println(s2);
} 

This example finds any occurrence of the characters, and deletes them. You probably want to look for the sequence of characters and replace with a space, but I'll leave that up to you: look at the doc for java.util.regex.Pattern.

And I suspect that the "box" is some other character, not a return or newline.