Adding java string basic methods

Java/java-basics/JavaString.java

@@ -0,0 +1,28 @@
+import java.util.*;
+
+public class JavaContinue {
+    public static void main(String[] args) {
+        String str1 = "Hello, World!";
+        String str2 = new String("Hello, World!");
+    }
+
+    public static void stringPool() {
+        String str1 = "Hello, World!";
+        String str2 = "Hello, World!";
+    }
+
+    public static void accessingStringData(String[] args) {
+        String str = "Hello, World!";
+        char firstChar = str.charAt(0);
+    }
+
+    public static void manipulateString(String[] args) {
+        String str1 = "Hello, ";
+        String str2 = "World!";
+        String result = str1 + str2;
+
+        String str = "Hello, World!";
+        String upperCaseStr = str.toUpperCase();
+        String lowerCaseStr = str.toLowerCase();
+    }
+}

Java/java-basics/JavaStringMethods.java

@@ -0,0 +1,52 @@
+import java.util.*;
+
+public class JavaContinue {
+    public static void main(String[] args) {
+        String str = "Welcome To Javadevjournal!";
+        int length = str.length();
+        System.out.println("The length of the string is: " + length);
+    }
+
+    public static void javaMethods() {
+        // Using string literals
+        String myString = "Hello, World!";
+
+        // Using the new keyword
+        String myString = new String("Hello, World!");
+
+        // Using the valueOf() method
+        int myInt = 42;
+        String myString = String.valueOf(myInt);
+
+        // Using StringBuilder or StringBuffer
+        StringBuilder builder = new StringBuilder();
+        builder.append("Hello");
+        builder.append(", ");
+        builder.append("World!");
+        String myString = builder.toString();
+    }
+
+    public static void charAtExample(String[] args) {
+        String str = "Welcome To Javadevjournal!";
+        char ch = str.charAt(1);
+        System.out.println("The character at index 1 is: " + ch);
+    }
+
+    public static void substringExample(String[] args) {
+        String str = "Welcome To Javadevjournal!";
+        String subStr = str.substring(11, 24);
+        System.out.println("The substring is: " + subStr);
+    }
+
+    public static void indexOfExample(String[] args) {
+        String str = "Welcome to Javadevjournal";
+        int index = str.indexOf("o");
+        System.out.println("The index of the first 'o' is: " + index);
+    }
+
+    public static void replaceMethod(String[] args) {
+        String str = "Welcome to Javadevjournal!";
+        String newStr = str.replace("o", "0");
+        System.out.println("The new string is: " + newStr);
+    }
+}