BAEL-2242

2018-10-14 17:27:34 +01:00
parent 194a6541c4
commit 6b3803a683
5 changed files with 175 additions and 0 deletions
@@ -0,0 +1,19 @@
+package com.baeldung.removal;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+public class CollectionRemoveIf {
+
+    public static void main(String args[]) {
+        Collection<String> names = new ArrayList<>();
+        names.add("John");
+        names.add("Ana");
+        names.add("Mary");
+        names.add("Anthony");
+        names.add("Mark");
+
+        names.removeIf(e -> e.startsWith("A"));
+        System.out.println(String.join(",", names));
+    }
+}
@@ -0,0 +1,28 @@
+package com.baeldung.removal;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+
+public class Iterators {
+
+    public static void main(String args[]) {
+        Collection<String> names = new ArrayList<>();
+        names.add("John");
+        names.add("Ana");
+        names.add("Mary");
+        names.add("Anthony");
+        names.add("Mark");
+
+        Iterator<String> i = names.iterator();
+
+        while (i.hasNext()) {
+            String e = i.next();
+            if (e.startsWith("A")) {
+                i.remove();
+            }
+        }
+
+        System.out.println(String.join(",", names));
+    }
+}
@@ -0,0 +1,23 @@
+package com.baeldung.removal;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.stream.Collectors;
+
+public class StreamFilterAndCollector {
+
+    public static void main(String args[]) {
+        Collection<String> names = new ArrayList<>();
+        names.add("John");
+        names.add("Ana");
+        names.add("Mary");
+        names.add("Anthony");
+        names.add("Mark");
+
+        Collection<String> filteredCollection = names
+                .stream()
+                .filter(e -> !e.startsWith("A"))
+                .collect(Collectors.toList());
+        System.out.println(String.join(",", filteredCollection));
+    }
+}
@@ -0,0 +1,28 @@
+package com.baeldung.removal;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public class StreamPartitioningBy {
+
+    public static void main(String args[]) {
+        Collection<String> names = new ArrayList<>();
+        names.add("John");
+        names.add("Ana");
+        names.add("Mary");
+        names.add("Anthony");
+        names.add("Mark");
+
+        Map<Boolean, List<String>> classifiedElements = names
+                .stream()
+                .collect(Collectors.partitioningBy((String e) -> !e.startsWith("A")));
+
+        String matching = String.join(",", classifiedElements.get(Boolean.TRUE));
+        String nonMatching = String.join(",", classifiedElements.get(Boolean.FALSE));
+        System.out.println("Matching elements: " + matching);
+        System.out.println("Non matching elements: " + nonMatching);
+    }
+}