Write a java method: public static String repeat(String str, int num) that returns the string str repeated n times. For Example: repeat("delta", 4) returns "deltadeltadeltadelta".

java Write a public static method named getStringReversed that takes in 1 argument of type String and returns the String in reverse order.

Write an O(n) time program that prompts the user to entertwo strings and tests whether the second string is a substring of the first string.Suppose the neighboring characters in the string are distinct. (Don’t use theindexOf method in the String class.) Here is a sample run of the program: Enter a string s1: Welcome to Java ↵EnterEnter a string s2: come ↵Entermatched at index 3

Please solve this in Java Thank

The StringBuilder class is providedin the Java library. Provide your own implementation for the following methods(name the new class MyStringBuilder2):public MyStringBuilder2();public MyStringBuilder2(char[] chars);public MyStringBuilder2(String s);public MyStringBuilder2 insert(int offset, MyStringBuilder2 s);public MyStringBuilder2 reverse();public MyStringBuilder2 substring(int begin);public MyStringBuilder2 toUpperCase();

LabProgram.java 1 import java.util.Scanner; 2 3 public class LabProgram { 4 5 /* Define your method here */ public static void main(String[] args) { /* Type your code here. */ } 7 8 9. 10 } 11

Write a method called drawDiamond() that outputs lines of '*' to form a Diamond with equal length diagonals. Method drawDiamond() has one parameter, an integer representing the diagonal of the diamond. Assume the diagonal length is always odd and less than 20. Output 9 spaces before the first '*' on the first line for correct formatting. Either drawTriangle or at least one of its helper methods must be recursive. Ex: If the input of the program is: 3 the method drawDiamond() outputs:  * ***  * Ex: If the input of the program is: 15 the method drawDiamond() outputs:        *       ***      *****     *******    *********   ***********  ************ ***************  *************   ***********    *********     *******      *****       ***        * Note: the diamond is made up of a rightside up triangle and an upside down triangle.       import java.util.Scanner; public class LabProgram {      /* TODO: Write drawDiamond() method here. */   /* You can add other helper methods if needed…

Write a program in Java called StringIndex. Create a method called printIndex that passes your fullname as a parameter. Method should print each character of the String along with the index.  For example, if String parameter passed is “Kimberly”, the program should print: 0: K 1: I 2: m 3: b 4: e 5: r 6: l 7: y

Write in JAVA

Write a method (with a parameter n), n: integer type that prints numbers from 1 to n. The print out should be 5 numbers per line. All the output numbers should be aligned well. Call the method with n=13 and n=10 in the main()