我需要编写一个程序来输出ASCII艺术图案。 模式的大小应根据类常量动态更改。
它应该是这样的：
Number of boxes: 4
Width of boxes: 6
Height of boxes: 3
+------+------+------+------+
| | | | |
| | | | |
| | | | |
+------+------+------+------+
public class testing {
public static void main(String[] args) {
for (int height = 1; height <= 2; height++) {
System.out.println("");
for (int box = 1; box <= 4; box++) {
System.out.print("+");
// System.out.print("|");
for (int width = 1; width <= 6; width++) {
System.out.print("_");
}
}
}
}
}
答案 0 :(得分：0)
您需要检查您的循环是否位于＆＃34; edge＆＃34;一个盒子并相应地添加不同的字符。
public class testing {
public static void main(String args[]) {
int height = 3;
int width = 6;
int numberOfBoxes = 4;
String output = "";
// height + 2 for the extra row of characters on the top and bottom
for(int h = 0; h < height + 2; h++ ){
for(int box = 0; box < numberOfBoxes; box++ ){
// If on the outer edge, when h = 0 or h = height + 1
if (h % (height + 1) == 0) {
output += "+";
for (int w = 1; w <= width; w++){
output += "-";
}
// Otherwise only draw the vertical lines.
} else {
output += "|";
for (int w = 1; w <= width; w++){
output += " ";
}
}
}
// Add the last line of characters
if (h % (height + 1) == 0) {
output += "+";
} else {
output += "|";
}
// Add new line character
output += "\n";
}
System.out.println(output);
}
}
但是，上面我在输出的末尾添加了很多较小的字符串。相反，使用StringBuilder（）更有意义。将字符串添加在一起效率非常低，并创建了许多对象，只能使用一次并抛出。相反（使用StringBuilder（））：
public class test {
public static void main(String args[]) {
int height = 3;
int width = 6;
int numberOfBoxes = 4;
StringBuilder output = new StringBuilder();
// height + 2 for the extra row of characters on the top and bottom
for(int h = 0; h < height + 2; h++ ){
for(int box = 0; box < numberOfBoxes; box++ ){
// If on the outer edge, when h = 0 or h = height + 1
if (h % (height + 1) == 0) {
output.append("+");
for (int w = 1; w <= width; w++){
output.append("-");
}
// Otherwise only draw the vertical lines.
} else {
output.append("|");
for (int w = 1; w <= width; w++){
output.append(" ");
}
}
}
// Add the last line of characters
if (h % (height + 1) == 0) {
output.append("+");
} else {
output.append("|");
}
// Add new line character
output.append("\n");
}
System.out.println(output.toString());
}
}
答案 1 :(得分：0)
这是一个工作代码，以防它帮助你:)试图将它分成函数，使其更清晰。请注意，上面给出的代码比这个代码更有效，但是这个代码可能更容易理解。
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
static int numBoxes = 4; //Change this to your liking.
static int height =3; //Just how many | will it have.
static int width = 6; //
public static void main (String[] args) throws java.lang.Exception
{
topBot();
printHeight();
topBot();
}
public static void topBot(){
for(int i = 0; i <= numBoxes*width;i++)
{
if(i%width == 0) //When this happens we're in a new box.
System.out.print("+");
else
System.out.print("-");
}
System.out.println(); //Move to next line.
}
public static void printHeight(){
for(int j = 0; j < height;j++){
for(int i = 0; i <= numBoxes*width;i++)
{
if(i%width == 0)
System.out.print("|"); //Whenever this happens we're in a new box.
else
System.out.print(" ");
}
System.out.println(); //Move to next line.
}
}
}
答案 2 :(得分：0)
您可以将每个框表示为一个几乎正方形 String[] 数组：
+------
|
|
|
+------
然后你可以将这些数组逐行拼接起来，并添加一个右边框：
+------+------+------+------+------+
| | | | | |
| | | | | |
| | | | | |
+------+------+------+------+------+
此代码适用于 Java 11：
// number of boxes
int n = 5;
// width of boxes
int width = 6;
// height of boxes
int height = 3;
System.out.println("Number of boxes: " + n);
System.out.println("Width of boxes: " + width);
System.out.println("Height of boxes: " + height);
String[] boxes = IntStream.range(0, n)
// Stream<String>
.mapToObj(i -> Stream.of(
// upper border row
Stream.of("+" + "-".repeat(width)
// add a right border to the last box
+ (i < n - 1 ? "" : "+")),
// inner part with a left border
IntStream.range(0, height)
.mapToObj(row -> "|" + " ".repeat(width)
// add a right border to the last box
+ (i < n - 1 ? "" : "|")),
// lower border row
Stream.of("+" + "-".repeat(width)
// add a right border to the last box
+ (i < n - 1 ? "" : "+")))
.flatMap(Function.identity())
.toArray(String[]::new))
// reduce Stream<String[]> to a single array String[]
.reduce((box1, box2) -> IntStream.range(0, height + 2)
.mapToObj(i -> box1[i] + box2[i])
.toArray(String[]::new))
.orElse(new String[0]);
// output
Arrays.stream(boxes).forEach(System.out::println);
输出：
Number of boxes: 5
Width of boxes: 6
Height of boxes: 3
+------+------+------+------+------+
| | | | | |
| | | | | |
| | | | | |
+------+------+------+------+------+