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| Java程序展示循环 |
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/*
Java Programming for Engineers
Julio Sanchez
Maria P. Canton
ISBN: 0849308100
Publisher: CRC Press
*/
// File name: AsciiTable.java
//Reference: Chapter 11
//
//Java program to demonstrate looping
//Topics:
// 1. Using several loop constructs simultaneously
// 2. Nested loops
//
public class AsciiTable {
public static void main(String[] args) {
// Local variables
char hexLetter; // For table header
char ascCode = 0x20; // First ASCII code
// Counters for rows and columns
int row = 2;
int column;
System.out.print("\n\n");
System.out.print(" ");
System.out.println("ASCII CHARACTER TABLE");
System.out.print(" ");
System.out.println("characters 0x20 to 0xff");
System.out.print("\n ");
// Loops 1 and 2
// Display column heads for numbers 0 to F hexadecimal
for (hexLetter = '0'; hexLetter <= '9'; hexLetter++)
System.out.print(" " + hexLetter);
for (hexLetter = 'A'; hexLetter <= 'F'; hexLetter++)
System.out.print(" " + hexLetter);
// Blank line to separate table head from data
System.out.println("\n");
// Loop 3
// While ASCII codes smaller than 0x80 display row head
// and leading spaces
// Loop 4 (nested in loop 3)
// Display row of ASCII codes for columns 0 to 0x0F.
// Add a new line at end of each row
while (ascCode < 0x80) {
System.out.print(" " + row);
for (column = 0; column < 16; column++) {
System.out.print(" " + ascCode);
ascCode++;
}
System.out.print("\n\n");
row++;
}
}
}
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