In this article we are going to see a menu driven string application by using Java program. Menu driven program in java using switch case example, Menu driven program in java using methods, Menu driven program for array operations in java, Menu driven program in java using if else, Menu driven program in java using scanner class, Menu driven program in java using do while, Menu-driven program in java.
Also Read: Java Menu Driven Program to Perform Basic Operations on Two Matrices
Java Menu Driven Program for String Operations
We will design a menu driven program for 4 String operations. Like this you can add more String operations as well.
- String Length
- Concatenating two strings
- Compare two strings
- Trim a string
User Defined Methods Used:
- len( ) – To find the length of the string
- concatenate( ) – Add two strings
- compareStr( ) – Compare two strings
- trimStr( ) – Trim whitespaces
Approach:
- In Driver method, take a while loop display all the methods.
- Ask the user to enter the choice.
- Use switch case for navigation.
- To find length of a string we will call the user defined method
len( )function. This function takes the string as input and then using inbuiltlength()method of the string library to print the length of the string period. - To concatenate two strings we will call the user defined method
concatenate( )which asks the user to input two strings and then concatenate strings(using inbuiltconcat()library method) and store it in another variable. - To compare two strings, call user defined method
compareStr( )which compares two Strings by using inbuiltequals()method and returns a True if both String matches else returns False value. - To trim a string call user defined
trimStr( ). This method takes in one string and then uses the string librarytrim()method to trim the whitespaces from the string.
Program:
import java.util.*;
import java.lang.*;
public class Main
{
static String s,s1,s2;
static Scanner sc = new Scanner(System.in);
//Find length of a String
static void len()
{
sc.nextLine();
System.out.println("Enter the string");
s=sc.nextLine();
System.out.println("The string length is "+ s.length());
}
//Concatenate two Strings
static void concatenate()
{
sc.nextLine();
System.out.println("Enter First string to concat");
s = sc.nextLine();
System.out.println("Enter Second string to concat ");
s1 = sc.nextLine();
// Concatenating string s and s1 and storing in s2
s2 = s.concat(s1);
System.out.println("The concatenated string of "+s+" and "+s1+" is "+s2);
}
//Compare two Strings
static void compareStr()
{
sc.nextLine();
System.out.println("Enter First string to compare");
s = sc.nextLine();
System.out.println("Enter Second string to compare");
s1 = sc.nextLine();
// b stores the comparison result
boolean b = s.equals(s1);
if(b)
System.out.println("The strings "+s+" and "+s1+ " are equal.");
else
System.out.println("The strings "+s+" and "+s1+ " are not equal.");
}
//Trimming spaces from String
static void trimStr()
{
sc.nextLine();
System.out.println("Enter string to trim");
s=sc.nextLine();
// Storing the trimmed string in s1
s1= s.trim();
System.out.println("The string "+s+" after trimming is "+s1);
}
//Driver method
public static void main(String []args)
{
int ch;
while(true)
{
System.out.println("---\t String Operations\t---");
System.out.println("1: Find the length Of String");
System.out.println("2: Concatenate two strings");
System.out.println("3: Compare two strings");
System.out.println("4: String Trimming");
System.out.println("5: Quit");
System.out.print("Enter your choice: ");
ch = sc.nextInt();
switch (ch)
{
case 1:len();
System.out.println("\n");
break;
case 2:concatenate();
System.out.println("\n");
break;
case 3:compareStr();
System.out.println("\n");
break;
case 4: trimStr();
System.out.println("\n");
break;
case 5:
System.exit(0);
default: System.out.println("Invalid choice! Retry");
}
}
}
}
Output:
--- String Operations --- 1: Find the length Of String 2: Concatenate two strings 3: Compare two strings 4: String Trimming 5: Quit Enter your choice: 1 Enter the string BtechGeeks The string length is 10 --- String Operations --- 1: Find the length Of String 2: Concatenate two strings 3: Compare two strings 4: String Trimming 5: Quit Enter your choice: 3 Enter First string to compare Exception Enter Second string to compare Error The strings Exception and Error are not equal. --- String Operations --- 1: Find the length Of String 2: Concatenate two strings 3: Compare two strings 4: String Trimming 5: Quit Enter your choice: 2 Enter First string to concat Btech Enter Second string to concat Geeks The concatenated string of Btech and Geeks is BtechGeeks --- String Operations --- 1: Find the length Of String 2: Concatenate two strings 3: Compare two strings 4: String Trimming 5: Quit Enter your choice: 4 Enter string to trim BtechGeeksBest The string BtechGeeksBest after trimming is BtechGeeksBest --- String Operations --- 1: Find the length Of String 2: Concatenate two strings 3: Compare two strings 4: String Trimming 5: Quit Enter your choice: 4 Enter string to trim India The string India after trimming is India --- String Operations --- 1: Find the length Of String 2: Concatenate two strings 3: Compare two strings 4: String Trimming 5: Quit Enter your choice: 5
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Test Yourself Menu Driven Program In Java Questions:
- Menu driven program in java using methods?
- Menu driven program in java for string operations?
- Java string program examples?
- Java program to perform string operations?
- String operations in java program?
- How to do string programs in java?
- How to do menu driven program in java?
- How to create menu driven program in java?