Create Concepts.java

Author: Deeksha-14

String/Concepts.java

@@ -0,0 +1,55 @@
+package random;
+
+public class Concep {
+
+	public static void main(String[] args) {
+		String s1= new String("hello world");
+		System.out.println(s1.charAt(3));
+		s1.length();//Returns the length of this string
+		System.out.println(s1.contains("o"));
+		System.out.println(s1.contains("f"));
+
+		
+			char[] chr = {'a','b','c'};
+			char[] car = {'h','e','d','a',' ','s',' '};
+			
+			String cop = String.copyValueOf(car);
+			System.out.println(cop);
+	
+			String check = String.copyValueOf(car, 2, 4);
+			System.out.println(check);
+			
+			
+			String name="MyName";
+			int number=50;
+			
+			String formattedString = String.format("Hello my name is %s and i am %d years old", name, number);
+			
+			System.out.println("Example 1 : "+formattedString);
+	
+			
+			double pi = 3.14159265;
+			formattedString = String.format("The value of pi is approximately %.2f", pi);
+			System.out.println("Example 2 : "+formattedString);
+			
+			int a = 10;
+			System.out.println(a);
+			a = 11;
+			System.out.println(a);
+			
+			int age = 3;
+			formattedString = String.format("her age is %010d", age);
+			System.out.println("example 3: "+formattedString);
+			
+			
+			String text ="Hello World";
+			boolean isStrtWit=text.startsWith("H");//true
+			boolean isStrtWit2=text.startsWith("o");//false
+			boolean isStrtWit3=text.startsWith("h");//false
+			
+			
+			System.out.println(isStrtWit+" "+isStrtWit2+" "+isStrtWit3);
+	
+	}
+
+}