Snake case to Camel case

07 - Strings - Working With Text/src/SnakeToCamel.java

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+//Converting Snake Case string to Camel Case.
+//Input: str = "snake_case_to_camel_case"
+//Output: "SnakeCaseToCamelCase"
+
+import java.io.*; 
+class SnakeTOCamel { 
+
+	// Function to convert snake case to camel case	 
+	public static String 
+	snakeToCamel(String str) 
+	{ 
+		// Capitalizing first letter of string 
+		str = str.substring(0, 1).toUpperCase() + str.substring(1); 
+		StringBuilder builder = new StringBuilder(str);
+		// Traversing the string character by 
+		// character and remove underscore 
+		// and capitalize next letter 
+		for (int i = 0; i < builder.length(); i++) { 
+
+			// Checking char is underscore 
+			if (builder.charAt(i) == '_') { 
+
+				builder.deleteCharAt(i); 
+				builder.replace(i, i + 1,String.valueOf(Character.toUpperCase(builder.charAt(i)))); 
+			} 
+		} 
+		// Returning in String type 
+		return builder.toString(); 
+	}
+	public static void main(String[] args){ 
+
+		// Given String 
+		String str = "snake_to_camel"; 
+		// Function Call 
+		str = snakeToCamel(str);
+		// Modified String 
+		System.out.println(str); 
+	} 
+} 

07 - Strings - Working With Text/src/stringPadding.java

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+//padding a String
+//Input: str = “PaddingString”, ch =’-‘, L = 20
+//Output:
+//Left Padding: -------PaddingString
+//Right Padding: PaddingString-------
+
+import java.lang.*; 
+import java.io.*; 
+
+public class padString { 
+
+	// Function to perform left padding 
+	public static String leftPadding(String input, char ch, int L) 
+	{ 
+		String result = String.format("%" + L + "s", input).replace(' ', ch); 
+		// Returning the result
+		return result; 
+	}
+
+	// Function to perform right padding 
+	public static String rightPadding(String input, char ch, int L) 
+	{
+		String result = String.format("%" + (-L) + "s", input).replace(' ', ch); 
+
+		// Returning the result
+		return result; 
+	} 
+
+	public static void main(String[] args) 
+	{ 
+
+		String str = "StringPadding"; 
+		char ch = '-'; 
+		int L = 20; 
+
+		System.out.println(leftPadding(str, ch, L)); 
+		System.out.println(centerPadding(str, ch, L));
+		System.out.println(rightPadding(str, ch, L)); 
+	} 
+}