CC150: 1.3

package isPermutation;

import java.util.Arrays;

public class isPermutation{
public static void main (String[] args) {
	String s="good";
	String t="adog";/*give s,t*/
	System.out.println(isPerm(s,t));
}

public static boolean isPerm(String s, String t){
if(s.length()!=t.length()) {
return false;/*if the length is different,it should be false*/
}
if(s==null||t==null) {/*if s,t empty,false*/
return false;
}
char[] array1=s.toCharArray();/*put s to array1*/
char[] array2=t.toCharArray();

Arrays.sort(array1);
Arrays.sort(array2);/*sort s,t*/

if(Arrays.toString(array1).equals(Arrays.toString(array2))){
	return true;/*compare s,t*/
}
else
	return false;
}
}