Answer:
The class is called MyApp which inherits from JFrame and implements the ActionListener interface.
Explanation:
The class is called MyApp which extends the swing class JFrame and implements the ActionListener interface for event handling. As a results it needs to implement a method called actionPerformed for handling the relevant events that may be raised from the user interface. Since it extends JFrame, it has access to all the public and protected methods defined in JFrame(for example setTitle to set the title of the frame).
/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
class NestedLoops {
public static void main (String [] args) {
int numRows = 4;
int numCols = 5;
int i,j;
char ch = 'A';
// Note: You'll need to declare more variables
/* Your solution goes here */
for ( i = 0; i < numRows; i++) { // Outer loop runs for numRows times
for ( j = 0; j < numCols; j++) { // Inner loop runs for numCols times
System.out.print(i+1);
System.out.print((char)(ch+j));
System.out.print(" ");
}
}
System.out.println("");
return;
}
}
