├── Program for Beginers ├── casechange.java ├── midpoint.java ├── star.java └── star1.java └── String ├── addionstr.java ├── palindrome.java ├── replacestring.java ├── stringcount.java ├── swapword.java └── wordcount.java /Program for Beginers/casechange.java: -------------------------------------------------------------------------------- 1 | public class casechange { 2 | public static void main(String[] args) { 3 | String str="hELlo woRLd proGramMing"; 4 | int count=0; 5 | for (char i:str.toCharArray()) 6 | { 7 | count++; 8 | } 9 | for(int i=0;i='A'&&ch<='Z'){ 13 | System.out.print((char)(str.charAt(i)+32)); 14 | } 15 | 16 | else{ 17 | System.out.print((char)(str.charAt(i)-32)); 18 | } 19 | } 20 | System.out.println(); 21 | System.out.println(str.replaceAll("\\s","")); 22 | } 23 | } 24 | -------------------------------------------------------------------------------- /Program for Beginers/midpoint.java: -------------------------------------------------------------------------------- 1 | import java.util.*; 2 | class midpoint{ 3 | public static void main(String[] args) { 4 | Scanner sc=new Scanner(System.in); 5 | int x1=sc.nextInt(); 6 | int x2=sc.nextInt(); 7 | int y1=sc.nextInt(); 8 | int y2=sc.nextInt(); 9 | int mid=(x1+x2)/2; 10 | System.out.println("Mid1:"+mid); 11 | int mid2=(y1+y2)/2; 12 | System.out.println("Mid2:"+mid2); 13 | 14 | } 15 | } -------------------------------------------------------------------------------- /Program for Beginers/star.java: -------------------------------------------------------------------------------- 1 | package patterns; 2 | import java.util.*; 3 | 4 | public class star { 5 | public static void main(String args[]) 6 | { 7 | Scanner s=new Scanner(System.in); 8 | int n=s.nextInt(); 9 | for(int i=0;i<=n;i++) 10 | { 11 | System.out.println(i+""); 12 | 13 | } 14 | } 15 | 16 | } 17 | 18 | 19 | } 20 | -------------------------------------------------------------------------------- /Program for Beginers/star1.java: -------------------------------------------------------------------------------- 1 | 2 | package patterns; 3 | 4 | public class star1 { 5 | public static void main(String args[]) 6 | { 7 | int n=5; 8 | for(int i=0;i<=n;i++) 9 | { 10 | for(int j=0;j<=n;j++){ 11 | if(i==0||j==0||i==n-1||j==n-1){ 12 | System.out.print("*"); 13 | } 14 | else{ 15 | System.out.print("n "); 16 | } 17 | } 18 | System.out.println(""); 19 | } 20 | } 21 | 22 | } 23 | -------------------------------------------------------------------------------- /String/addionstr.java: -------------------------------------------------------------------------------- 1 | package String; 2 | import java.util.*; 3 | import java.lang.*; 4 | public class addionstr { 5 | public static void main(String[] args) { 6 | Scanner s=new Scanner(System.in); 7 | String s1=s.next(); 8 | String s2=s.next(); 9 | int a=Integer.parseInt(s1); 10 | int b=Integer.parseInt(s2); 11 | System.out.println("The addition of String: "+(a+b)); 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /String/palindrome.java: -------------------------------------------------------------------------------- 1 | package String; 2 | 3 | public class palindrome { 4 | public static void main(String[] args) { 5 | String str="MADAM MADAM"; 6 | int count=0; 7 | String s=""; 8 | for (char i:str.toCharArray()) 9 | { 10 | count++; 11 | } 12 | //System.out.println("The count is: "+count); 13 | for(int i=count-1;i>=0;i--) 14 | { 15 | s=s+str.charAt(i); 16 | } 17 | if(str.equals(s)){ 18 | System.out.println(str+" is a palindrome."); 19 | } 20 | else{ 21 | System.out.println(str+" is not a palindrome."); 22 | } 23 | } 24 | 25 | } 26 | -------------------------------------------------------------------------------- /String/replacestring.java: -------------------------------------------------------------------------------- 1 | package String; 2 | import java.util.*; 3 | public class replacestring { 4 | public static void main(String[] args) { 5 | Scanner s=new Scanner(System.in); 6 | String s1=s.nextLine(); 7 | System.out.println(s1.replace('a','e')); 8 | 9 | String s2=s.nextLine(); 10 | System.out.println(s2.replaceAll(s2,"Designer")); 11 | 12 | } 13 | 14 | } 15 | -------------------------------------------------------------------------------- /String/stringcount.java: -------------------------------------------------------------------------------- 1 | package String; 2 | 3 | public class stringcount { 4 | public static void main(String[] args) { 5 | String str="hELlo woRLd proGramMing"; 6 | int count=0; 7 | String s=""; 8 | for (char i:str.toCharArray()) 9 | { 10 | count++; 11 | } 12 | System.out.println(str+" The count is: "+count); 13 | 14 | } 15 | 16 | } 17 | -------------------------------------------------------------------------------- /String/swapword.java: -------------------------------------------------------------------------------- 1 | package String; 2 | import java.util.*; 3 | public class swapword { 4 | public static void main(String[] args) { 5 | Scanner s=new Scanner(System.in); 6 | String s1=s.nextLine(); 7 | String []s2=s1.split(""); 8 | int wc=s2.length; 9 | System.out.println("The word count in the string: "+wc); 10 | } 11 | 12 | } 13 | -------------------------------------------------------------------------------- /String/wordcount.java: -------------------------------------------------------------------------------- 1 | package String; 2 | 3 | import java.util.Scanner; 4 | 5 | public class wordcount { 6 | public static void main(String[] args) { 7 | Scanner s=new Scanner(System.in); 8 | String s1=s.nextLine(); 9 | String []s2=s1.split(""); 10 | int wc=s2.length; 11 | System.out.println("The word count in the string: "+wc); 12 | } 13 | } 14 | --------------------------------------------------------------------------------