在此先发帖,在此先感谢您的帮助。 我已经用Java制作了一个10 * 10的网格,并尝试使行号出现在网格的左侧,在尝试了不同的打印格式和选项后,我现在在这里寻求一些帮助。任何指针将不胜感激。
public class ArrayTest {
public final static int SIZE =10;
final static char[][] GRID = new char[SIZE][SIZE];
public static void main(String[] args){
setGrid();
printGrid();
}
public static void setGrid(){
for( int row = 0; row< SIZE;row++){
for(int column = 0; column<SIZE; column++){
GRID[row][column]= ' ';
}
}
}
public static void printGrid(){
System.out.println(" 10 x 10 Grid");
System.out.println(" 0 1 2 3 4 5 6 7 8 9");
System.out.println(" +---+---+---+---+---+---+---+---+---+---+");
for(int row = 0; row< SIZE; row++){
for(int column = 0; column<SIZE; column++){
System.out.print(" |" + GRID[row][column] + "");
}
System.out.println(" | " + row );
System.out.println(" +---+---+---+---+---+---+---+---+---+---+");
}
}
}
答案 0 :(得分:1)
for(int row = 0; row< SIZE; row++){
System.out.print( " " + row + " | ");
for ( int column = 0; column<SIZE; column++){
... <print column values for this row here>
}
System.out.println("");
}
当您在顶部打印出列号时,请不要忘记添加额外的空格,以解决行号指示器所用的空间。
答案 1 :(得分:0)
您的算法是一个很好的起点。无论如何,我想扩大您对扩展用例和现有(可靠且可自定义)基于文本的表格格式库的使用的认识。
这取决于您的方法。我添加了以下功能:
您可以进一步优化它,例如:
在下面或在线查找资源,您可以在test & download on Ideone上找到
。import java.util.stream.Collectors;
import java.util.stream.IntStream;
class GridDataToTextTable {
public static final int WIDTH = 10;
public static final int HEIGHT = 10;
public static void main(String[] args) {
System.out.printf("%d x %d Grid%n", WIDTH, HEIGHT);
String[][] generateGrid = generateGrid(WIDTH, HEIGHT);
printGrid(WIDTH, HEIGHT, generateGrid);
}
public static String[][] generateGrid(int width, int height) {
String[][] gridData = new String[height][width];
for (int row = 0; row < height; row++) {
for (int column = 0; column < width; column++) {
gridData[row][column] = " ";
}
}
return gridData;
}
public static String padRight(String s, int n) {
return String.format("%-" + n + "s", s);
}
public static String padLeft(String s, int n) {
return String.format("%" + n + "s", s);
}
public static String repeatChar(char c, int n) {
return IntStream.range(0, n).mapToObj(i -> String.valueOf(c)).collect(Collectors.joining(""));
}
public static void printGrid(int width, int height, String[][] gridData) {
int lengthOfMaxRowNum = String.valueOf(height - 1).length();
// TODO: can be calculated as max length over Strings in gridData
int maxCellWidth = 4;
System.out.print(padRight(" ", lengthOfMaxRowNum));
for (int column = 0; column < width; column++) {
System.out.print(padLeft(String.valueOf(column), maxCellWidth + 1));
}
System.out.println();
printHorizontalLine(width, lengthOfMaxRowNum, maxCellWidth);
System.out.println();
for (int row = 0; row < height; row++) {
// TODO: alignment of headers (col-numbers) could be customizable
System.out.print(padLeft(String.valueOf(row), lengthOfMaxRowNum));
for (int column = 0; column < width; column++) {
// TODO: alignment of cell-data could be customizable
System.out.print("|" + padLeft(gridData[row][column], maxCellWidth));
}
System.out.println("|");
printHorizontalLine(width, lengthOfMaxRowNum, maxCellWidth);
System.out.println();
}
}
private static void printHorizontalLine(int width, int lengthOfMaxRowNum, int maxCellWidth) {
String line = repeatChar('-', maxCellWidth);
System.out.print(padLeft(" ", lengthOfMaxRowNum));
for (int column = 0; column < width; column++) {
System.out.printf("+" + line);
}
System.out.printf("+");
}
}
要以表格或网格格式打印基于文本的数据,请参见this answer。
也许您可以使用以下库之一: