Enter (V) if the following is a valid Java statement or (X) if it is invalid boo
ID: 3839788 • Letter: E
Question
Enter (V) if the following is a valid Java statement or (X) if it is invalid bool_b_b: byte $xyz; String str; double 3r^d; public class my program int n = 5; long if; Trace the following Java code snippets. Write all intermediate variables values. public static void main (String [] args) {int count = 2; int y = 5; int z = 0; count ++; --y; y = y + count; z = --y + 1; System, out.println("The value of count 1s" + count); System, out. Println ("The value of y 1s" + y); System, out. Println ("The value of z 1s" + z); public static void main (String [] args) {String str1, str2; int Y; char X; str1 = "Success is the result of hard work"; x = str1, charAt (5); System, out. Print1n ("the value of x is; " + x); y = stri.indexOf ('h'); y = str1.indexOf ('w', y); str2 = str1. Substring (y); System. Out. Println (y); System. Out. Println (str2);}Explanation / Answer
6)
bool _b_b; NOT VALID, bool is not a data type in Java
byte $xyz; // VALID
String str; // VALID
double 3r^d; // NOT VALID , identifier name can not start with digit
public class my program; // NOT VALID, space can not be in name
int n = 5; // VALID
long if; // NOT VALID , if is keyword so can not be used as identifier name
2. 1)
public static void main(String[] args) {
int count = 2;
int y = 5;
int z = 0;
count++; // count = 3
--y; // y = 4
y = y + count; // y = 7
z = --y + 1; // y = 6, z = 7
System.out.println("The value of count is "+count); // The value of count is 3
System.out.println("The value of y is "+y); // The value of y is 6
System.out.println("The value of z is "+z); // The value of z is 7
}
2. 2)
public static void main(String[] args) {
String str1, str2;
int y;
char x;
str1 = "Success is the result of hard work";
x = str1.charAt(5); // x = s
System.out.println("The value of x is "+x); // The value of x is s
y = str1.indexOf('h'); // y = 12
y = str1.indexOf('w', y); // y = 30
str2 = str1.substring(y); // str2 = work
System.out.println(x); // s
System.out.println(y); // 30
System.out.println(str2); // work
}
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