At first sight I found missing semicolumn and brace:

/** Display's a rectangle */
void show  Rectangle(int argWide, int  argTall) {
for(int i = 0; i < argWide; i++) {
System.out.print("*");
{
System.out.print("\n");
for(int i = 0; i < (argTall - 2); i++) {
--> System.out.print("*");
--> }
for(int j = 0; j < (argWide - 2); j++) {
System.out.print(" ");
}
System.out.println("*");
}

i cant understand this
if this is a method , r u calling it from someother
class

/** Display's a rectangle */
void show  Rectangle(int argWide, int  argTall) {

ok , and another thing is , u cant use the same
variable inside another block , like u have used the
variable 'i' inside the block.

u must get an error like this

i is already defined in main(java.lang.String[])
for(int i =0;i<2;i++)
^
1 error

semi colon is missing on the top of for loop j;

Header of the show() method is not correct.