Java String Program

Java String Program

java string programs for interview
java string programs examples with output
java string programs javatpoint
java string methods
string-programs in java geeksforgeeks
java string programs pdf
java string programs without using built in function
java programs on strings and arrays

I'm trying to do a String Program using BufferedReader where you take a String from the user and change the case of the letters. this is what I've got so far:

import java.io.*;
public class StringProg {
    public void ff()throws IOException {
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Enter a sentence");
        String str=br.readLine();
        String s="";
        int l=str.length();
        char c;
        for(int a = 1; a < l; a++) {
            c = str.charAt(a);
            char d = 0;
            if(c >= 97 && c <= 122) {
                d = c - 32;
            } else if(c >= 65 && c <= 90) {
                d = c + 32;
            }
         System.out.print(d);
        }
    }
}

when I run it, it says "possible loss of precision; required char; found int" could someone help me rectify this please?

Update: this is the new code after correction:

import java.io.*;
 public class StringProg
  {
    public void ff()throws IOException
   {
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    System.out.println("Enter a sentence");
    String str=br.readLine();
    String s="";
    int l=str.length();
    char c;
    char d;
    for(int a=1;a<l;a++)
    {
        c=str.charAt(a);
        if(c>=97 && c<=122)
        {
             d= (char)(c-32);
        }
        else if(c>=65 &&c<=90);
        {
            d=(char)(c+32);
        }
     System.out.print(d);
    }
    }
}

but the output isn't working.Could someone point out my mistake please? when I enter "a" or "b", there is no output but when I enter "E" it changes to "e", but when I enter "HidE" it changes to 2 squares(I don't know how to print it on the keyboard ) and "e".


char d= c-32;

c-32 expression results in int (because 32 will be treated as int) and you are trying to assign int value to type char, which is why you are getting "possible loss of precision error". You need to explicitly cast 32 to char (or) entire expression on right side to char.

Same rule applies for char d=c+32; statement also and other places you have used int value with char type.

Java-String-Programs Archives, String is a sequence of characters, for e.g. “Hello” is a string of 5 characters. In java, string is an immutable object which means it is constant and can cannot be � Some of the common ones are: StringBuilder/StringBuffer reverse () method Using char/byte array and traverse in reverse direction and populate the result string


String Programs in Java, Java String Exercises [107 exercises with solution]. 1. Write a Java program to get the character at the given index within the String. Go to the� Strings, which are widely used in Java programming, are a sequence of characters. In Java programming language, strings are treated as objects. The Java platform provides the String class to create and manipulate strings. Creating Strings. The most direct way to create a string is to write − String greeting = "Hello world!";


Simply cast back to a char once you do your calculations. For instance, char d = (char)(c - 32). It basically just wants you to clarify and let the program know that you want it to convert back and forth.

Java String (With Examples), Affiliate M. Software Testing Tutorial. Testing. Proc*C. social media marketing. SMM. String Programs Check Case Of A Character Example Java Program String Reverse Example Java Program Trim A String Example Java Program Find all Substrings of a given string Example Java Program Repetitions In String Example Java Program First Repeated Character Example Java Program String Buffer


This occurs because when you add an int to a character it becomes an int, then you try to (implicitly) cast that int back to a char and the int may not "fit into" the char so you get an error

Lets say that c='A', so 65

char d= c+32
char d= 65+32
char d= 97;

Now 97 might correspond to a valid character, but we can't know that at compile time (as in principle it could be any integer), if the int is too big or small to fit in the char then parts of it are thrown away; hence the warning. You can cast it to (char) to say you accept that, but the whole process isn't great.

char d= (char)(c+32);

All this looks like its checking for capitalisation and setting to lower case (and vice versa). If so; don't do that, its really really unclear, use:

c=str.charAt(a);
if(Character.isUpperCase(c)){
     char d=Character.toLowerCase(c);
}

Java, In the Java programming language, strings are objects. The Java platform provides the String class to create and manipulate strings. Creating Strings. The most� Interfaces and Classes in Strings in Java CharBuffer: This class implements the CharSequence interface. This class is used to allow character buffers to be used String: String is a sequence of characters. In java, objects of String are immutable which means a constant and cannot String


Java Exercises: String exercises, This section contains Java String Programs, examples on String Class. Here you will find programs to get length of the string, convert string into character array,� A String in Java is actually an object, which contain methods that can perform certain operations on strings. For example, the length of a string can be found with the length () method:


Java String, In our previous blogs – Java tutorial and object-oriented programming, we have discussed the various fundamental concepts of Java and have� Java program to print Even length words in a String Given a string str, write a Java program to print all words with even length in the given string. Examples: Input: s = “This is…


Strings (The Java™ Tutorials > Learning the Java Language , Java String class provides a lot of methods to perform operations on strings such as compare (), concat (), equals (), split (), length (), replace (), compareTo (), intern (), substring () etc. The java.lang.String class implements Serializable, Comparable and CharSequence interfaces.