Example 1: Java program to find the unique characters from a given string
KW.java
importjava.util.Scanner;classKW{publicstaticvoidmain(Stringargs[]){Strings1,s2="";System.out.println("———————————————————————————————————————————");System.out.println("Program to find unique characters");System.out.println("———————————————————————————————————————————");Scannersc=newScanner(System.in);System.out.print("Enter the string ");s1=sc.nextLine();for(inti=0;i<s1.length();i++){if(s2.indexOf(s1.charAt(i))==-1){s2=s2+s1.charAt(i);}}System.out.println("\nUnique characters "+s2);System.out.println("———————————————————————————————————————————");}}
Output
kodingwindow@kw:~$ javac KW.java kodingwindow@kw:~$ java KW
———————————————————————————————————————————
Program to find unique characters
———————————————————————————————————————————
Enter the string KODINGWINDOW
Unique characters KODINGW
———————————————————————————————————————————
kodingwindow@kw:~$
Example 2: Java program to find the unique characters from a given string
KW.java
importjava.util.Scanner;classKW{publicstaticvoidmain(Stringargs[]){Strings;System.out.println("———————————————————————————————————————————");System.out.println("Program to find unique characters");System.out.println("———————————————————————————————————————————");Scannersc=newScanner(System.in);System.out.print("Enter the string ");s=sc.nextLine();s=s.toUpperCase();for(charletter='A';letter<='Z';letter++){for(inti=0;i<s.length();i++){if(letter==s.charAt(i)){System.out.print("\nUnique character "+letter);break;}}}System.out.println("\n———————————————————————————————————————————");}}
Output
kodingwindow@kw:~$ javac KW.java kodingwindow@kw:~$ java KW
———————————————————————————————————————————
Program to find unique characters
———————————————————————————————————————————
Enter the string KODINGWINDOW
Unique character D
Unique character G
Unique character I
Unique character K
Unique character N
Unique character O
Unique character W
———————————————————————————————————————————
kodingwindow@kw:~$
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