Kuidas programmeerimise abil ühendada viissada rida üheks reale?

To concatenate 500 lines into a single string in Java, you can use the StringBuilder class, which is efficient for concatenating large numbers of strings.

Example:

StringBuilder sb = new StringBuilder();
for (int i = 0; i < 500; i++) {
    sb.append("Line number ").append(i).append(" ");
}
String result = sb.toString();
System.out.println(result);

If the lines are already in a collection, such as a list, you can use String.join:

List<String> lines = ...; // list of 500 lines
String result = String.join("", lines);

Both methods efficiently combine many lines into one.