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Example 12 of the Big O chapter that prints all permutations of a str… #249

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Example 12 of the Big O chapter that prints all permutations of a str… #249

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24 changes: 24 additions & 0 deletions Java/Big O/Example_12/Example.java
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package Example_12;

public class Example {

void permutation(String str) {
permutation(str, "");
}

void permutation(String str, String prefix){
if(str.length() == 0){
System.out.println(prefix);
} else {
for(int i = 0; i < str.length(); i++){
String rem = str.substring(0, i) + str.substring(i + 1);
permutation(rem, prefix + str.charAt(i));
}
}
}

public static void main(String[] args) {
Example ex = new Example();
ex.permutation("abcd");
}
}