Please answer the following questions in the java language.

1. Create a method (function) with an int type parameter. This function will print out prime numbers on screen range from 0 to the parameter value. The function will return the number of the prime numbers. Use main() method to test if your function works well.

2. Read and try to understand the following example:

Summarize the using of Scanner: how to read data from keyboard, how to read data from a file,

and how to read data from a web page.

3. Whats the output of the following program:

public class NewClass

{

public static void main(String[] args)

{

String s1 = "Computer Science";

int x = 262;

String s2 = s1 + " " + x;

String s3 = s2.substring(10,17);

String s4 = " is fun";

String s5 = s2 + s4;

System.out.println("s1: " + s1.replace("e", "E"));

System.out.println("s2: " + s2.toLowerCase());

System.out.println("s3: " + s3);

System.out.println("s4: " + s4.toUpperCase());

System.out.println("s5: " + s5);

//showing effect of precedence

x = s1.indexOf("e",9);

int y = s1.indexOf("e");

String s6 = x + y + "total";

String s7 = "total " + x + y;

String s8 = " " + x + y + "total";

System.out.println("s6: " + s6);

System.out.println("s7: " + s7);

System.out.println("s8: " + s8);

}

}