How do I parse a String value to a char type, in Java?
I know how to do it to int and double (for example Integer.parseInt("123")).
Is there a class for Strings and Chars?
How do I parse a String value to a char type, in Java?
I know how to do it to int and double (for example Integer.parseInt("123")).
Is there a class for Strings and Chars?
If your string contains exactly one character the simplest way to convert it to a character is probably to call the charAt method:
char c = s.charAt(0);
"d", you can just: char c = "d".charAt(0);You can use the .charAt(int) function with Strings to retrieve the char value at any index. If you want to convert the String to a char array, try calling .toCharArray() on the String.
String g = "line";
char c = g.charAt(0); // returns 'l'
char[] c_arr = g.toCharArray(); // returns a length 4 char array ['l','i','n','e']
you can use this trick :
String s = "p";
char c = s.charAt(0);
"123" into '1', is that what you're after?char c = "p".charAt(0); also works.I found this useful:
double --> Double.parseDouble(String);
float --> Float.parseFloat(String);
long --> Long.parseLong(String);
int --> Integer.parseInt(String);
char --> stringGoesHere.charAt(int position);
short --> Short.parseShort(String);
byte --> Byte.parseByte(String);
boolean --> Boolean.parseBoolean(String);
char --> StringGoesHere.parseFloat(int position); is correct? Honestly I haven't checked, but I'm fairly sure String doesn't have a parseFloat method, and even if it does, I can't see why that would be what you'd be trying to do there.If the string is 1 character long, just take that character. If the string is not 1 character long, it cannot be parsed into a character.
org.apache.commons.lang.StringEscapeUtils.(un)EscapeJava methods are probaby what you want
Answer from brainzzy not mine :
The simplest way to convert a String to a char is using charAt():
String stringAns="hello";
char charAns=stringAns.charAt(0);//Gives You 'h'
char charAns=stringAns.charAt(1);//Gives You 'e'
char charAns=stringAns.charAt(2);//Gives You 'l'
char charAns=stringAns.charAt(3);//Gives You 'l'
char charAns=stringAns.charAt(4);//Gives You 'o'
char charAns=stringAns.charAt(5);//Gives You:: Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 5
Here is a full script:
import java.util.Scanner;
class demo {
String accNo,name,fatherName,motherName;
int age;
static double rate=0.25;
static double balance=1000;
Scanner scanString=new Scanner(System.in);
Scanner scanNum=new Scanner(System.in);
void input()
{
System.out.print("Account Number:");
accNo=scanString.nextLine();
System.out.print("Name:");
name=scanString.nextLine();
System.out.print("Father's Name:");
fatherName=scanString.nextLine();
System.out.print("Mother's Name:");
motherName=scanString.nextLine();
System.out.print("Age:");
age=scanNum.nextInt();
System.out.println();
}
void withdraw() {
System.out.print("How Much:");
double withdraw=scanNum.nextDouble();
balance=balance-withdraw;
if(balance<1000)
{
System.out.println("Invalid Data Entry\n Balance below Rs 1000 not allowed");
System.exit(0);
}
}
void deposit() {
System.out.print("How Much:");
double deposit=scanNum.nextDouble();
balance=balance+deposit;
}
void display() {
System.out.println("Your Balnce:Rs "+balance);
}
void oneYear() {
System.out.println("After one year:");
balance+=balance*rate*0.01;
}
public static void main(String args[]) {
demo d1=new demo();
d1.input();
d1.display();
while(true) {//Withdraw/Deposit
System.out.println("Withdraw/Deposit Press W/D:");
String reply1= ((d1.scanString.nextLine()).toLowerCase()).trim();
char reply=reply1.charAt(0);
if(reply=='w') {
d1.withdraw();
}
else if(reply=='d') {
d1.deposit();
}
else {
System.out.println("Invalid Entry");
}
//More Manipulation
System.out.println("Want More Manipulations: Y/N:");
String manipulation1= ((d1.scanString.nextLine()).toLowerCase()).trim();
char manipulation=manipulation1.charAt(0);
System.out.println(manipulation);
if(manipulation=='y') { }
else if(manipulation=='n') {
break;
}
else {
System.out.println("Invalid Entry");
break;
}
}
d1.oneYear();
d1.display();
}
}
If you want to parse a String to a char, whereas the String object represent more than one character, you just simply use the following expression: char c = (char) Integer.parseInt(s). Where s equals the String you want to parse. Most people forget that char's represent a 16-bit number, and thus can be a part of any numerical expression :)
char is, just like int and double. He even gave the example String "123". and who says you can't convert a char to a String with a length larger than one, and back? Try it yourself with char c = 123 : String.valueOf((int) c).equals("123") returns true.int. For your example, you needed to cast to int, which means that you are working not with the original char, but with an int, which happens to somehow correspond to the original char.import java.io.*;
class ss1
{
public static void main(String args[])
{
String a = new String("sample");
System.out.println("Result: ");
for(int i=0;i<a.length();i++)
{
System.out.println(a.charAt(i));
}
}
}
You can do the following:
String str = "abcd";
char arr[] = new char[len]; // len is the length of the array
arr = str.toCharArray();
String str = "abc"; char[] char_str = str.toCharArray();An Essay way :
public class CharToInt{
public static void main(String[] poo){
String ss="toyota";
for(int i=0;i<ss.length();i++)
{
char c = ss.charAt(i);
// int a=c;
System.out.println(c); } }
}
For Output see this link: Click here
Thanks :-)
You can use the .charAt(int) function with Strings to retrieve the char value at any index. If you want to convert the String to a char array, try calling .toCharArray() on the String. If the string is 1 character long, just take that character by calling .charAt(0) (or .First() in C#).