Java Codes

saudahmedkadapa · saudahmedkadapa · commit 4250ddd32b24 · 2024-05-25T22:48:32.000+05:30
diff --git a/FileIo.java b/FileIo.java
@@ -0,0 +1,18 @@
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+public class FileIo {
+    public static void main(String[] args) {
+        try {
+            FileInputStream obj=new FileInputStream("demo.txt");
+           int i= obj.read();
+            System.out.println((char)i);
+        } catch (Exception e) {
+            
+            e.printStackTrace();
+        }
+    }
+
+    
+}
diff --git a/FileIo1.java b/FileIo1.java
@@ -0,0 +1,23 @@
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+
+public class FileIo1 {
+    public static void main(String[] args) {
+        try {
+            FileInputStream pbj=new FileInputStream("demo.txt");
+            int i=0;
+            while ((i=pbj.read())!=-1) {
+                System.out.print((char)i);
+                
+            }
+            pbj.close();
+        } catch (Exception e) {
+           
+            e.printStackTrace();
+        }
+        
+
+        
+    }
+    
+}
diff --git a/FileOut.java b/FileOut.java
@@ -0,0 +1,27 @@
+import java.io.BufferedOutputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+
+public class FileOut {
+    public static void main(String[] args) {
+        try {
+            FileOutputStream obj=new FileOutputStream("demo.txt");
+            BufferedOutputStream bos=new BufferedOutputStream(obj);
+            String s="Saud ahmed kadapa Cdac";
+            byte b[]=s.getBytes();
+            bos.write(b);
+            bos.flush();
+            bos.close();
+            obj.close();
+
+
+
+
+        } catch (Exception e) {
+            
+            e.printStackTrace();
+        }
+
+    }
+    
+}
diff --git a/Hashmap.java b/Hashmap.java
@@ -0,0 +1,13 @@
+import java.util.HashMap;
+import java.util.Map;
+
+public class Hashmap {
+    public static void main(String[] args) {
+        Map<Integer,String>obj=new HashMap<>();
+        obj.put(45, "Saud");
+        obj.put(55, "Ahmed");
+       System.out.println(obj.containsKey(65));
+        System.out.println(obj);
+    }
+    
+}
