[ADD] 2021.06.12 - 컬렉션 프레임워크

list / set / map

Author: dlswer23

TIL/2021.06.13/list/ArrayAsListExample.java

@@ -0,0 +1,19 @@
+package list;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class ArrayAsListExample {
+    public static void main(String[]args){
+        List<String> list1 = Arrays.asList("홍길동","이은별");
+        for(String name :list1){
+            System.out.println(name);
+        }
+
+        List<Integer> list2 = Arrays.asList(1,2,3);
+        for(int value : list2){
+            System.out.println(value);
+        }
+    }
+}

TIL/2021.06.13/list/ArrayListExample.java

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+package list;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ArrayListExample {
+    public static void main(String []args){
+        List<String> list = new ArrayList<String>();
+
+        list.add("이은별");
+        list.add("강은빈");
+
+        System.out.println(list);
+
+
+    }
+}

TIL/2021.06.13/map/HashMapExample.java

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+package map;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public class HashMapExample {
+    public static void main(String []args){
+        Set<String> set = new HashSet<String>();
+
+        set.add("Java");
+        set.add("Sprint");
+
+        System.out.println(set);
+    }
+}

TIL/2021.06.13/map/Student.java

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+package map;
+
+public class Student {
+
+    private int sno;
+    private String name;
+
+
+    public Student(int sno, String name){
+        this.sno = sno;
+        this.name = name;
+    }
+}
+

TIL/2021.06.13/set/HashSetExample.java

@@ -0,0 +1,19 @@
+package set;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public class HashSetExample {
+    public static void main(String []args){
+        Map<String,Integer> map = new HashMap<String, Integer>();
+
+        map.put("Java",2);
+        map.put("Spring",1);
+
+        map.remove("Spring",1);
+
+        System.out.println(map);
+    }
+}