In this program, we will create three character variables and check they contain a printable character or not, and print the appropriate message.
Program/Source Code:
The source code to check a given character is a printable character or not without using the built-in library method is given below. The given program is compiled and executed successfully.
// Java program to check a given character is a printable character
// or not without using the built-in library method
public class Main {
static boolean isPunctuation(char ch) {
if (ch == '!' || ch == '"' || ch == '#' || ch == '$' || ch == '%' || ch == '&' || ch == '\'' || ch == '(' || ch == ')' || ch == '*' || ch == '+' || ch == ',' || ch == '-' || ch == '.' || ch == '/' || ch == ':' || ch == ';' || ch == '<' || ch == '=' || ch == '>' || ch == '?' || ch == '@' || ch == '[' || ch == '\\' || ch == ']' || ch == '^' || ch == '`' || ch == '{' || ch == '|' || ch == '}')
return true;
return false;
}
static boolean isAlphaNumeric(char ch) {
if ((ch >= '0' & ch <= '9') || (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z'))
return true;
return false;
}
static boolean isPrintable(char ch) {
if (isAlphaNumeric(ch) || isPunctuation(ch))
return true;
return false;
}
public static void main(String[] args) {
char ch1 = 'a';
char ch2 = 'A';
char ch3 = 95;
if (isPrintable(ch1))
System.out.printf("Given character is a printable character\n");
else
System.out.printf("Given character is not a printable character\n");
if (isPrintable(ch2))
System.out.printf("Given character is a printable character\n");
else
System.out.printf("Given character is not a printable character\n");
if (isPrintable(ch3))
System.out.printf("Given character is a printable character\n");
else
System.out.printf("Given character is not a printable character\n");
}
}
Output:
Given character is a printable character
Given character is a printable character
Given character is not a printable character
Explanation:
In the above program, we created a public class Main. It contains four static methods main(), isPunctuation(), isAlphanumeric(), and isPrintable().
The isPunctuation() method returns a Boolean value based on input character, it returns true if the given character is a punctuation mark otherwise it returns false.
The isAlphanumeric() method returns a Boolean value based on input character, it returns true if a given character is an alphanumeric character otherwise it returns false.
The isPrintable() method returns a Boolean value based on input character, it returns true if a given character is a printable character otherwise it returns false.
The main() method is an entry point for the program. Here, we created three variables with some initial values. Then we checked variables containing a printable character or not and printed appropriate messages.
In this program, we will create three character variables and check they contain a printable character or not, and print the appropriate message.
Program/Source Code:
The source code to check a given character is a printable character or not without using the built-in library method is given below. The given program is compiled and executed successfully.
Output:
Explanation:
In the above program, we created a public class Main. It contains four static methods main(), isPunctuation(), isAlphanumeric(), and isPrintable().
The isPunctuation() method returns a Boolean value based on input character, it returns true if the given character is a punctuation mark otherwise it returns false.
The isAlphanumeric() method returns a Boolean value based on input character, it returns true if a given character is an alphanumeric character otherwise it returns false.
The isPrintable() method returns a Boolean value based on input character, it returns true if a given character is a printable character otherwise it returns false.
The main() method is an entry point for the program. Here, we created three variables with some initial values. Then we checked variables containing a printable character or not and printed appropriate messages.