java-将字符串显示为框
作者:互联网
我只是无法弄清楚如何获得想要的结果.这是我的代码
import java.util.Scanner;
public class StringInABox
{
public static void main(String[]args)
{
Scanner scan = new Scanner(System.in);
System.out.println("Enter a phrase or word!");
String Phrase = scan.nextLine();
String CapPhrase = Phrase.toUpperCase();
int PhraseLength = CapPhrase.length();
String SidePhrase = CapPhrase.substring(1);
int SidePhraseL = SidePhrase.length()-1;
for (int Letter = 0; Letter<PhraseLength; Letter++)
System.out.print(CapPhrase.charAt(Letter)+" ");
System.out.println();
for (int Letter = 0; Letter<SidePhraseL; Letter++)
System.out.println(SidePhrase.charAt(Letter));
for (int Letters = SidePhraseL-1; Letters>=0; Letters--)
{ for (int Space=0; Space <= PhraseLength*2-3;Space++)
System.out.print(" ");
System.out.println(SidePhrase.charAt(Letters));}
for (int Letter = PhraseLength-1; Letter>=0; Letter--)
System.out.print(CapPhrase.charAt(Letter)+" ");
}
}
结果应该是这样的:
H E L P
E L
L E
P L E H
但是我只能得到:
H E L P
E
L
L
E
P L E H
我的想法已经用完了.我是一个初学者,因此不应该使用高级编码.
解决方法:
您非常接近,但是这里的问题是for循环的顺序.要获得所需的输出,如下所示:
E L
L E
您需要在同一循环中打印这两个字符,即在同一行上打印时.因此,您需要分别存储E和L值的IndexFromFront和IndexFromBack变量.
初始循环后,打印字符H E L P
for (int Letter = 0; Letter < PhraseLength; Letter++)
System.out.print(CapPhrase.charAt(Letter) + " ");
System.out.println();
您需要从第一个索引(即1)开始访问E,IndexFromBack的值为PhraseLength-1-(IndexFromFront).现在您已经有了要从原始字符串打印的值的索引,您需要获得正确的间距,即2 *(PhraseLength-1)-1,因为每个字符后都有一个空格.所以你的第二个循环来打印行
E L
L E
应该如下:
for (int Letter = 1; Letter < PhraseLength-1; Letter++) {
int IndexFromFront = Letter;
int IndexFromBack = PhraseLength-1-Letter;
// Print character from the start of string at given Index
System.out.print(CapPhrase.charAt(IndexFromFront));
// Print required spaces
for (int Space = 0; Space < 2*(PhraseLength-1)-1; Space++) {
System.out.print(" ");
}
// End space print
// Print character from the end of string matching the required index
System.out.print(CapPhrase.charAt(IndexFromBack));
// Printing on this line is complete, so print a new line.
System.out.println();
}
最后一行,即给定输入字符串的反行,可以使用循环进行打印,如下所示:
for (int Letter = PhraseLength - 1; Letter >= 0; Letter--)
System.out.print(CapPhrase.charAt(Letter) + " ");
}
因此,最终的代码如下:
/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
public class StringInABox {
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.println("Enter a phrase or word!");
String Phrase = scan.nextLine();
String CapPhrase = Phrase.toUpperCase();
int PhraseLength = CapPhrase.length();
for (int Letter = 0; Letter < PhraseLength; Letter++)
System.out.print(CapPhrase.charAt(Letter) + " ");
System.out.println();
for (int Letter = 1; Letter < PhraseLength - 1; Letter++) {
int IndexFromFront = Letter;
int IndexFromBack = PhraseLength - 1 - Letter;
System.out.print(CapPhrase.charAt(IndexFromFront));
// Print required spaces
for (int Space = 0; Space < 2 * (PhraseLength - 1) - 1; Space++) {
System.out.print(" ");
}
// End space print
System.out.print(CapPhrase.charAt(IndexFromBack));
System.out.println();
}
for (int Letter = PhraseLength - 1; Letter >= 0; Letter--)
System.out.print(CapPhrase.charAt(Letter) + " ");
}
}
这是HELPINGYOUOUT的示例输出
Enter a phrase or word!
H E L P I N G Y O U O U T
E U
L O
P U
I O
N Y
G G
Y N
O I
U P
O L
U E
T U O U O Y G N I P L E H
编辑:更具可读性的代码
/* package whatever; // don't place package name! */
import java.util.*;
import java.lang.*;
import java.io.*;
/* Name of the class has to be "Main" only if the class is public. */
public class StringInABox {
public static void printSpaces(int phraseLength) {
for (int space = 0; space < 2 * (phraseLength - 1) - 1; space++) {
System.out.print(" ");
}
}
public static void printTopRow(String capPhrase, int phraseLength) {
for (int letter = 0; letter < phraseLength; letter++)
System.out.print(capPhrase.charAt(letter) + " ");
System.out.println();
}
public static void printIntermediateBoxRows(String capPhrase, int phraseLength) {
for (int letter = 1; letter < phraseLength - 1; letter++) {
int indexFromFront = letter;
int indexFromBack = phraseLength - 1 - letter;
System.out.print(capPhrase.charAt(indexFromFront));
// Print required spaces
printSpaces(phraseLength);
// End space print
System.out.print(capPhrase.charAt(indexFromBack));
System.out.println();
}
}
public static void printLastRow(String capPhrase, int phraseLength) {
for (int letter = phraseLength - 1; letter >= 0; letter--)
System.out.print(capPhrase.charAt(letter) + " ");
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.println("Enter a phrase or word!");
String phrase = scan.nextLine();
String capPhrase = phrase.toUpperCase();
int phraseLength = capPhrase.length();
// Print the box
printTopRow(capPhrase, phraseLength);
printIntermediateBoxRows(capPhrase, phraseLength);
printLastRow(capPhrase, phraseLength);
}
}
标签:whitespace,string,java 来源: https://codeday.me/bug/20191025/1927498.html