Question: Write an algorithm to print all possible combinations of characters in a string. La classe String fornisce il metodo concatper la concatenazione di stringhe la cui signature è: Quindi: assegna a str3 una nuova stringa formata da str1 con str2 aggiunto alla fine; insomma "Nome Cognome". Permutation and Combination are a part of Combinatorics. Here is the steps to implement string permutations: Take out the first char and keep it constant. We keep track of the current index in the given input string and the length of the output string so far. Java – Concatenate Strings. Enter a String : TOP TOP TPO OTP OPT PTO POT Related Programs:-★ Convert Decimal to Octal ★ Convert Decimal to Binary ★ Print the Factorial of a number using recursion ★ Print the possible combination of a string ★ Generate Fibonacci series using recursion The algorithm will move forward by incrementing i & ras long as they do not exceed arrays length. window reaches the last character of the first string. charAt() method. your code looks fine. 6. An empty or NULL string is considered to be a substring of every string. Java String substring() method is used to get the substring of a given string based on the passed indexes. hi all , this the example , i have a string contains 4 chars (A,B,C,D). A Java String Array is an object that holds a fixed number of String values. As the String is a class in Java, you have to create objects for creating any string. generate link and share the link here. There are two ways to concat string in java: By + (string concatenation) operator We will first take the first character from the String and permute with the remaining chars. REPEAT STEP 4 to STEP 7 UNTIL i