import java.util.*;
class App {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("Enter a String: ");
String line = in.nextLine();
boolean space = true;
boolean first = false;
for (int i = 0; i < line.length(); i++) {
if (line.substring(i, i + 1).equals(" ")) {
System.out.print(line.substring(i, i + 1));
space = !space;
first = false;
} else if (space) {
if (!first) {
System.out.print(line.substring(i, i + 1) + ".");
first = true;
}
} else {
System.out.print(line.substring(i, i + 1));
}
}
System.out.println();
in.close();
}
}
Do the coding without using boolean, array and split
import java.util.*;
class App {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("Enter a String: ");
String line = in.nextLine();
int space = 1;
int first = -1;
for (int i = 0; i < line.length(); i++) {
if (line.substring(i, i + 1).equals(" ")) {
System.out.print(line.substring(i, i + 1));
space *= -1;
first = -1;
} else if (space == 1) {
if (first == -1) {
System.out.print(line.substring(i, i + 1) + ".");
first = 1;
}
} else {
System.out.print(line.substring(i, i + 1));
}
}
System.out.println();
in.close();
}
}
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