java codes

Author: saudahmedkadapa

BufferIo.java

@@ -0,0 +1,29 @@
+import java.io.BufferedInputStream;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+
+public class BufferIo {
+    public static void main(String[] args) {
+        
+        try {
+            FileInputStream fis = new FileInputStream("demo.txt");
+            BufferedInputStream bis=new BufferedInputStream(fis);
+            int i=0;
+            while((i=fis.read())!=-1)
+            {
+                System.out.print((char)i);
+            }
+            fis.close();
+            bis.close();
+
+
+            
+        } catch (Exception e) {
+            
+            e.printStackTrace();
+        }
+        
+       
+    }
+    
+}

Collection.java

@@ -0,0 +1,13 @@
+import java.util.HashMap;
+
+public class Collection {
+    public static void main(String[] args) {
+    HashMap<String,Integer> obj=new HashMap<String,Integer>();
+    obj.put("saud", 45);
+    obj.put("sohail", 745);
+    obj.remove("saud");
+    obj.clear();
+    System.out.println(obj);
+    }
+    
+}

CollectionComprato.java

@@ -0,0 +1,16 @@
+import java.util.ArrayList;
+import java.util.Collections;
+
+public class CollectionComprato {
+    public static void main(String[] args) {
+        ArrayList<Integer> obj=new ArrayList<>();
+        obj.add(45);
+        obj.add(4);
+        obj.add(7);
+        obj.add(1);
+        System.out.println(obj);
+        Collections.sort(obj);
+        System.out.println(obj);
+    }
+    
+}

ConstructorAccessModifiers.java

@@ -0,0 +1,25 @@
+public class ConstructorAccessModifiers {
+    ConstructorAccessModifiers()                    // Default Constructor
+    {
+        System.out.println("Default Constructor");
+
+    }
+
+    class InnerClass{
+        public InnerClass()                        //public COnstructor
+        {
+            System.out.println("Public Constructor");
+
+        }
+    }
+
+    class PriInnerClass{
+        protected PriInnerClass()                         //Protected
+        {
+            System.out.println("Protected ");
+
+        }
+    }
+    
+}
+

ConstructorMainTest.java

@@ -0,0 +1,13 @@
+///import ConstructorAccessModifiers.InnerClass;
+
+//import ConstructorAccessModifiers.PriInnerClass;
+
+public class ConstructorMainTest {
+    public static void main(String[] args) {
+        ConstructorAccessModifiers obj=new ConstructorAccessModifiers();
+        ConstructorAccessModifiers.InnerClass InObj=obj.new InnerClass();
+        ConstructorAccessModifiers .PriInnerClass priObj=obj.new PriInnerClass();
+
+    }
+    
+}

DataHiding.java

@@ -1,3 +1,4 @@
+
 public class DataHiding {
 
     private int no;

DataTypes.java

@@ -0,0 +1,14 @@
+public class DataTypes {
+    public static void main(String[] args) {
+        boolean flag=true;
+        System.out.println("Flag="+flag);
+        int data =100;
+        System.out.println("Byte Range ="+Byte.MIN_VALUE+"--"+Byte.MAX_VALUE);
+        System.out.println("Integer Range="+Integer.MIN_VALUE+"-"+Integer.MAX_VALUE);
+        System.out.println("Long Range="+Long.MIN_VALUE+"-"+Long.MAX_VALUE);
+        System.out.println("FLoat Range="+Float.MIN_VALUE+"-"+Float.MAX_VALUE);
+
+
+    }
+    
+}