how to check if a char is a letter java
Character.isDigit(string.charAt(index)) //(JavaDoc) will return true if it's a digit
Character.isLetter(string.charAt(index)) //(JavaDoc) will return true if it's a letterhow to check if a char is a letter java
Character.isDigit(string.charAt(index)) //(JavaDoc) will return true if it's a digit
Character.isLetter(string.charAt(index)) //(JavaDoc) will return true if it's a lettercheck if a string contains a charater java
javaCopyimport java.util.*;
import java.lang.*;
import java.io.*;
public class Example1 {
public static void main(String[] args) {
String str = "Character";
System.out.println(str.contains("h"));
System.out.println(str.contains("Char"));
System.out.println(str.contains("ac"));
System.out.println(str.contains("v"));
System.out.println(str.contains("vl"));
}
}java string contains char
/*
This method returns true if the given string contains
the char n. It is necessary due to the
obsolescence of some compilers, which requires us
to write our own contains method.
*/
public static boolean contains_char (String main, char secondary)
{
boolean contains_result = false;
for (int i = 0 ; i < input.length () ; i++)
{
if (input.charAt (i) == secondary)
{
contains_result = true;
break;
}
}
return contains_result;
}
/*
for two chars:
*/
public static boolean contains_dualchar (String main, String secondary)
{
boolean contains_result = false;
for (int i = 0 ; i < input.length () ; i++)
{
if (input.charAt (i) == secondary.charAt (0))
{
if (input.charAt (i + 1) == secondary.charAt (1))
{
contains_result = true;
break;
}
}
}
return contains_result;
}Copyright © 2021 Codeinu
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