Data commit

Task/Phrase-reversals/Java/phrase-reversals.java

@@ -0,0 +1,36 @@
+import java.util.Arrays;
+
+public class PhraseRev{
+	private static String reverse(String x){
+		return new StringBuilder(x).reverse().toString();
+	}
+	
+	private static <T> T[] reverse(T[] x){
+		T[] rev = Arrays.copyOf(x, x.length);
+		for(int i = x.length - 1; i >= 0; i--){
+			rev[x.length - 1 - i] = x[i];
+		}
+		return rev;
+	}
+	
+	private static String join(String[] arr, String joinStr){
+		StringBuilder joined = new StringBuilder();
+		for(int i = 0; i < arr.length; i++){
+			joined.append(arr[i]);
+			if(i < arr.length - 1) joined.append(joinStr);
+		}
+		return joined.toString();
+	}
+	
+	public static void main(String[] args){
+		String str = "rosetta code phrase reversal";
+		
+		System.out.println("Straight-up reversed: " + reverse(str));
+		String[] words = str.split(" ");
+		for(int i = 0; i < words.length; i++){
+			words[i] = reverse(words[i]);
+		}
+		System.out.println("Reversed words: " + join(words, " "));
+		System.out.println("Reversed word order: " + join(reverse(str.split(" ")), " "));
+	}
+}