Java 程序不返回字符串
对于一门在线java课程,我正在编写Caesar密码。在这里,您输入一个字符串和一个移位号,然后返回移位字符串,其中所有字符都按移位号在字母表中“向下”移位。对于我的程序,我还有一个分组练习,其中我必须将移位的字符串分组为特定数字的组(例如:按3分组的“SGHSJDGDKGHSA”是“SGH SJD GDK GHSA”)。如果字符串中的字符数不能被分组数整除,则程序会在字符串末尾添加小写的x(例如:“SGHSJDGDKGHSA”按4分组为“SGHS JDGDKGHS Axxx”) 我的程序一直工作到使用分组函数(代码中的groupify方法)。不返回包含组的字符串。有关于如何解决这个问题的建议吗Java 程序不返回字符串,java,Java,对于一门在线java课程,我正在编写Caesar密码。在这里,您输入一个字符串和一个移位号,然后返回移位字符串,其中所有字符都按移位号在字母表中“向下”移位。对于我的程序,我还有一个分组练习,其中我必须将移位的字符串分组为特定数字的组(例如:按3分组的“SGHSJDGDKGHSA”是“SGH SJD GDK GHSA”)。如果字符串中的字符数不能被分组数整除,则程序会在字符串末尾添加小写的x(例如:“SGHSJDGDKGHSA”按4分组为“SGHS JDGDKGHS Axxx”) 我的程序一直工
import java.util.Scanner;
public class Crypto {
public static void main (String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("Enter a phrase.");
String userText = input.nextLine();
String normText = normalizeText(userText);
System.out.println("Enter a shift.");
String strUserShift = input.nextLine();
int userShift = Integer.parseInt(strUserShift);
String shiftText = shiftAlphabet(userShift, normText);
System.out.println("Shifted Text: " + shiftText);
System.out.println("Enter a grouping number.");
String strUserGroupNum = input.nextLine();
int userGroupNum = Integer.parseInt(strUserGroupNum);
String encryptedText = groupify(shiftText, userGroupNum);
System.out.print(encryptedText);
}
private static String normalizeText(String preText) {
StringBuilder newText = new StringBuilder();
for(int charNum = 0; charNum < preText.length(); charNum++) {
char charText = preText.charAt(charNum);
if (charText == '.' || charText == ',' || charText == ':' || charText == ';' || charText == '\'' || charText == '\\' || charText == '"' || charText == '!' || charText == '?' || charText == '(' || charText == ')') {
newText.append("");
} else {
String stringText = "" + charText;
stringText = stringText.toUpperCase();
newText.append(stringText);
}
}
return(newText.toString());
}
private static String shiftAlphabet(int shift, String normText) {
StringBuilder shiftedText = new StringBuilder();
String alphabet = "abcdefghijklmnopqrstuvwxyz".toUpperCase();
for (int index = 0; index < normText.length(); index++) {
char currentChar = normText.charAt(index);
int currentCharNum = alphabet.indexOf(currentChar);
int newCharNum = currentCharNum + shift;
while (newCharNum >= 26 || newCharNum < 0) {
if (newCharNum >= 26) {
newCharNum -= 26;
} else {
newCharNum += 26;
}
}
char newChar = alphabet.charAt(newCharNum);
shiftedText.append(newChar);
}
return(shiftedText.toString());
}
private static String groupify(String shiftText, int groupNum) {
StringBuilder sbShiftText = new StringBuilder();
StringBuilder sbGroupText = new StringBuilder();
String finalText = "";
while (sbShiftText.length() % groupNum != 0) {
sbShiftText.append("x");
}
for (int i = 1; i <= sbShiftText.length(); i++) {
if (groupNum == 1) {
finalText = shiftText;
} else {
// everything w group number > 1
if (groupNum % i == 0) {
sbGroupText.append(" ");
} else {
String tempStr = sbShiftText.charAt(i) + "";
sbGroupText.append(tempStr);
}
finalText = sbGroupText.toString();
}
}
return(finalText);
}
}
import java.util.Scanner;
公开类密码{
公共静态void main(字符串[]args){
扫描仪输入=新扫描仪(System.in);
System.out.println(“输入短语”);
字符串userText=input.nextLine();
字符串normText=normalizeText(userText);
System.out.println(“输入一个班次”);
字符串strUserShift=input.nextLine();
int userShift=Integer.parseInt(strUserShift);
字符串shiftText=shiftAlphabet(userShift,normText);
System.out.println(“移位文本:“+shiftText”);
System.out.println(“输入分组号”);
字符串strUserGroupNum=input.nextLine();
int userGroupNum=Integer.parseInt(strUserGroupNum);
字符串encryptedText=groupify(shiftText,userGroupNum);
系统输出打印(加密文本);
}
私有静态字符串normalizeText(字符串借口){
StringBuilder newText=新StringBuilder();
for(int charNum=0;charNum
StringBuilder sbShiftText = new StringBuilder();
StringBuilder sbShiftText = new StringBuilder(shiftText);
private static String groupify(String shiftText, int groupNum) {
StringBuilder sbShiftText = new StringBuilder();
StringBuilder sbGroupText = new StringBuilder();
String finalText = "";
*sbShiftText.append(shiftText);*
while (sbShiftText.length() % groupNum != 0) {
sbShiftText.append("x");
}
for (int i = 0; i <sbShiftText.length(); i++) {
if (groupNum == 1) {
finalText = shiftText;
}
else {
if (*i%groupNum* == 0&&i!=0) {
sbGroupText.append(" ");
}
String tempStr = sbShiftText.charAt(i) + "";
sbGroupText.append(tempStr);
finalText = sbGroupText.toString();
}
}
return finalText;
}