Minimal changes to build successfully with Java 8, plus optional profile to enable it

android/src/com/google/zxing/client/android/InactivityTimer.java

@@ -37,7 +37,7 @@ final class InactivityTimer {
   private final Activity activity;
   private final BroadcastReceiver powerStatusReceiver;
   private boolean registered;
-  private AsyncTask<?,?,?> inactivityTask;
+  private AsyncTask<Object,Object,Object> inactivityTask;
 
   InactivityTimer(Activity activity) {
     this.activity = activity;

android/src/com/google/zxing/client/android/share/AppPickerActivity.java

@@ -24,9 +24,11 @@ import android.view.View;
 import android.widget.Adapter;
 import android.widget.ListView;
 
+import java.util.List;
+
 public final class AppPickerActivity extends ListActivity {
 
-  private AsyncTask<?,?,?> backgroundTask;
+  private AsyncTask<Object,Object,List<AppInfo>> backgroundTask;
 
   @Override
   protected void onResume() {

androidtest/src/com/google/zxing/client/androidtest/BenchmarkActivity.java

@@ -27,7 +27,7 @@ public final class BenchmarkActivity extends Activity {
 
   private View runBenchmarkButton;
   private TextView textView;
-  private AsyncTask<?,?,?> benchmarkTask;
+  private AsyncTask<Object,Object,String> benchmarkTask;
 
   private final View.OnClickListener runBenchmark = new View.OnClickListener() {
     @Override

core/src/main/java/com/google/zxing/Binarizer.java

@@ -47,7 +47,7 @@ public abstract class Binarizer {
    * and passed in with each call for performance. However it is legal to keep more than one row
    * at a time if needed.
    *
-   * @param y The row to fetch, 0 <= y < bitmap height.
+   * @param y The row to fetch, which must be in [0, bitmap height)
    * @param row An optional preallocated array. If null or too small, it will be ignored.
    *            If used, the Binarizer will call BitArray.clear(). Always use the returned object.
    * @return The array of bits for this row (true means black).

core/src/main/java/com/google/zxing/BinaryBitmap.java

@@ -56,7 +56,7 @@ public final class BinaryBitmap {
    * cached data. Callers should assume this method is expensive and call it as seldom as possible.
    * This method is intended for decoding 1D barcodes and may choose to apply sharpening.
    *
-   * @param y The row to fetch, 0 <= y < bitmap height.
+   * @param y The row to fetch, which must be in [0, bitmap height)
    * @param row An optional preallocated array. If null or too small, it will be ignored.
    *            If used, the Binarizer will call BitArray.clear(). Always use the returned object.
    * @return The array of bits for this row (true means black).
@@ -96,8 +96,8 @@ public final class BinaryBitmap {
    * Returns a new object with cropped image data. Implementations may keep a reference to the
    * original data rather than a copy. Only callable if isCropSupported() is true.
    *
-   * @param left The left coordinate, 0 <= left < getWidth().
-   * @param top The top coordinate, 0 <= top <= getHeight().
+   * @param left The left coordinate, which must be in [0,getWidth())
+   * @param top The top coordinate, which must be in [0,getHeight())
    * @param width The width of the rectangle to crop.
    * @param height The height of the rectangle to crop.
    * @return A cropped version of this object.

core/src/main/java/com/google/zxing/LuminanceSource.java

@@ -42,7 +42,7 @@ public abstract class LuminanceSource {
    * to only fetch this row rather than the whole image, since no 2D Readers may be installed and
    * getMatrix() may never be called.
    *
-   * @param y The row to fetch, 0 <= y < getHeight().
+   * @param y The row to fetch, which must be in [0,getHeight())
    * @param row An optional preallocated array. If null or too small, it will be ignored.
    *            Always use the returned object, and ignore the .length of the array.
    * @return An array containing the luminance data.
@@ -51,7 +51,7 @@ public abstract class LuminanceSource {
 
   /**
    * Fetches luminance data for the underlying bitmap. Values should be fetched using:
-   * int luminance = array[y * width + x] & 0xff;
+   * {@code int luminance = array[y * width + x] & 0xff}
    *
    * @return A row-major 2D array of luminance values. Do not use result.length as it may be
    *         larger than width * height bytes on some platforms. Do not modify the contents
@@ -84,8 +84,8 @@ public abstract class LuminanceSource {
    * Returns a new object with cropped image data. Implementations may keep a reference to the
    * original data rather than a copy. Only callable if isCropSupported() is true.
    *
-   * @param left The left coordinate, 0 <= left < getWidth().
-   * @param top The top coordinate, 0 <= top <= getHeight().
+   * @param left The left coordinate, which must be in [0,getWidth())
+   * @param top The top coordinate, which must be in [0,getHeight())
    * @param width The width of the rectangle to crop.
    * @param height The height of the rectangle to crop.
    * @return A cropped version of this object.

core/src/main/java/com/google/zxing/ResultPoint.java

@@ -68,8 +68,8 @@ public class ResultPoint {
   }
 
   /**
-   * <p>Orders an array of three ResultPoints in an order [A,B,C] such that AB < AC and
-   * BC < AC and the angle between BC and BA is less than 180 degrees.
+   * Orders an array of three ResultPoints in an order [A,B,C] such that AB is less than AC
+   * and BC is less than AC, and the angle between BC and BA is less than 180 degrees.
    */
   public static void orderBestPatterns(ResultPoint[] patterns) {
 

core/src/main/java/com/google/zxing/oned/UPCEReader.java

@@ -24,7 +24,6 @@ import com.google.zxing.common.BitArray;
 
 /**
  * <p>Implements decoding of the UPC-E format.</p>
- * <p/>
  * <p><a href="http://www.barcodeisland.com/upce.phtml">This</a> is a great reference for
  * UPC-E information.</p>
  *

pom.xml

@@ -592,6 +592,30 @@
         </plugins>
       </build>
     </profile>
+    <profile>
+      <id>java8</id>
+      <build>
+        <pluginManagement>
+          <plugins>
+            <plugin>
+              <groupId>org.apache.maven.plugins</groupId>
+              <artifactId>maven-compiler-plugin</artifactId>
+              <configuration>
+                <source>8</source>
+                <target>8</target>
+              </configuration>
+            </plugin>
+            <plugin>
+              <groupId>org.apache.maven.plugins</groupId>
+              <artifactId>maven-javadoc-plugin</artifactId>
+              <configuration>
+                <javadocVersion>1.8</javadocVersion>
+              </configuration>
+            </plugin>
+          </plugins>
+        </pluginManagement>
+      </build>
+    </profile>
   </profiles>
 
 </project>