Simplified some Java code regarding Objects.requireNonNull().

java/io/nayuki/qrcodegen/QrCode.java

@@ -213,7 +213,7 @@ public final class QrCode {
 	 */
 	public QrCode(int ver, Ecc ecl, byte[] dataCodewords, int mask) {
 		// Check arguments
-		Objects.requireNonNull(ecl);
+		errorCorrectionLevel = Objects.requireNonNull(ecl);
 		if (ver < MIN_VERSION || ver > MAX_VERSION || mask < -1 || mask > 7)
 			throw new IllegalArgumentException("Value out of range");
 		Objects.requireNonNull(dataCodewords);
@@ -221,7 +221,6 @@ public final class QrCode {
 		// Initialize fields
 		version = ver;
 		size = ver * 4 + 17;
-		errorCorrectionLevel = ecl;
 		modules = new boolean[size][size];  // Entirely white grid
 		isFunction = new boolean[size][size];
 		

java/io/nayuki/qrcodegen/QrSegment.java

@@ -177,11 +177,10 @@ public final class QrSegment {
 	 * @throws IllegalArgumentException if the character count is negative
 	 */
 	public QrSegment(Mode md, int numCh, BitBuffer data) {
-		Objects.requireNonNull(md);
+		mode = Objects.requireNonNull(md);
 		Objects.requireNonNull(data);
 		if (numCh < 0)
 			throw new IllegalArgumentException("Invalid value");
-		mode = md;
 		numChars = numCh;
 		this.data = data.clone();  // Make defensive copy
 	}