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我正在嘗試製作遊戲，它非常簡單，並在代碼中進行了解釋。問題是如果我輸入一個類似於redright或redleft的命令，它將不起作用。你能發現問題嗎？調試簡單遊戲
下面的代碼：
進口java.util.Scanner的;
公共類PillarTransferEditSpaces {
String top = "red ";
String midup = "green ";
String midlow = "yellow ";
String low = "blue ";
public static void main(String args[]){
Scanner s = new Scanner(System.in);
System.out.println("Welcome to PillarShift. Press enter to continue");
String key = "anything but this";
if(key != s.nextLine()){
System.out.println("There are three pillars with 4 colors on them, you must move the colors from the left pillar to the right pillar");
}
if(key != s.nextLine()){
System.out.println("There are conditions.");
}
if(key != s.nextLine()){
System.out.println("1.The red color can move anywhere");
System.out.println("2.The green color can not move where the red color is ");
System.out.println("3.The yellow color can only be moved to an empty pillar or with the blue color");
System.out.println("4.The blue color must move to an empty pillar");
}
if(key != s.nextLine()){
System.out.println("This is what the first move looks like if you enter 'redright'");
}
if(key != s.nextLine()){
System.out.println(" _ _ _");
System.out.println(" red ");
System.out.println(" | | |");
System.out.println("green ");
System.out.println(" | | |");
System.out.println("yellow ");
System.out.println(" | | |");
System.out.println("blue ");
System.out.println(" | | |");
System.out.println(" --- --- ---");
}
if(key != s.nextLine()){
System.out.println("To make a move type the color and direction without a space and hit enter. ex: redright or blueleft");
}
String top = "red ";
String midup = "green ";
String midlow = "yellow ";
String low = "blue ";
while(top != " red" && midup != " green" && midlow != " yellow" && low != " blue"){
String move = s.nextLine();
if (move == "redleft"){
top = moveRedLeft(top, midup, midlow, low);
}
if (move == "redright"){
top = moveRedRight(top, midup, midlow, low);
}if (move == "greenright"){
midup = moveGreenRight(top, midup, midlow, low);
}if (move == "greenleft"){
midup = moveGreenLeft(top, midup, midlow, low);
}if (move == "yellowleft"){
midlow = moveYellowLeft(top, midup, midlow, low);
}if (move == "yellowright"){
midlow = moveYellowRight(top, midup, midlow, low);
}if (move == "blueleft"){
low = moveBlueLeft(top, midup, midlow, low);
}if (move == "blueright"){
low = moveBlueRight(top, midup, midlow, low);
}
System.out.println(" _ _ _");
System.out.println(top);
System.out.println(" | | |");
System.out.println(midup);
System.out.println(" | | |");
System.out.println(midlow);
System.out.println(" | | |");
System.out.println(low);
System.out.println(" | | |");
System.out.println(" --- --- ---");
}
System.out.println("Congrats, you solved it. Was it hard? :P");
}
private static String moveRedRight(String top,String midup,String midlow,String low){
if(top == "red "){
top = (" red ");
return top;}
if(top == (" red ")){
top = " red";
return top;
}
if (top == " red"){
System.out.println("No pillar to the right, where's it supposed to go?");
return top;
}
return top;
}
private static String moveRedLeft(String top,String midup,String midlow,String low){
if(top == " red"){
top = (" red ");
return top;
}
if(top == (" red ")){
top = "red ";
return top;
}
if (top == "red "){
System.out.println("No pillar to the left, where's it supposed to go?");
return top;
}
return top;
}
private static String moveGreenLeft(String top,String midup,String midlow,String low){
if(top == " red" && midup == " green"){
midup = (" green ");
return midup;
}
if(top == "red " && midup == " green"){
midup = (" green ");
return midup;
}
if(top == " red " && midup == " green"){
System.out.println("invalid movement");
return midup;
}
if (top == " red" && midup == " green "){
midup = "green ";
return midup;
}
if (top == "red " && midup == " green "){
System.out.println("invalid movement");
return midup;
}
if (top == " red " && midup == " green "){
midup = "green ";
return midup;
}
return midup;
}
private static String moveGreenRight(String top,String midup,String midlow,String low){
if(top == " red" && midup == " green"){
System.out.println("No pillar to the right, where's it supposed to go?");
return midup;
}
if(top == "red " && midup == " green"){
System.out.println("No pillar to the right, where's it supposed to go?");
return midup;
}
if(top == " red " && midup == " green"){
System.out.println("No pillar to the right, where's it supposed to go?");
return midup;
}
if (top == " red" && midup == " green "){
System.out.println("invalid movement");
return midup;
}
if (top == "red " && midup == " green "){
midup = " green";
return midup;
}
if (top == " red " && midup == " green "){
midup = " green";
return midup;
}
if (top == " red" && midup == "green "){
midup = " green ";
return midup;
}
if (top == "red " && midup == "green "){
midup = " green ";
return midup;
}
if (top == " red " && midup == "green "){
System.out.println("invalid movement");
return midup;
}
return midup;
}
private static String moveYellowRight(String top,String midup,String midlow,String low){
if(midlow == "yellow "){
if(top == " red " || midup == " green "){
System.out.println("invalid movement");return midlow;
}
}else{
midlow = " yellow ";return midlow;
}
if(midlow == " yellow "){
if(top == " red" || midup == " green"){
System.out.println("invalid movement");return midlow;
}
}else{
midlow = " yellow";return midlow;
}
if(midlow == " yellow"){
System.out.println("No pillar to the right, where's it supposed to go?");
}
return midlow;
}
private static String moveYellowLeft(String top,String midup,String midlow,String low){
if(midlow == " yellow"){
if(top == " red " || midup == " green "){
System.out.println("invalid movement");return midlow;
}
}else{
midlow = " yellow ";return midlow;
}
if(midlow == " yellow "){
if(top == "red " || midup == "green "){
System.out.println("invalid movement");return midlow;
}
}else{
midlow = "yellow ";return midlow;
}
if(midlow == "yellow "){
System.out.println("No pillar to the left, where's it supposed to go?");
}
return midlow;
} 私人靜態字符串moveBlueLeft（字符串頂部，字符串midup，字符串midlow，字符串低）{
if(low == " blue"){
if(top == " red " || midup == " green " || midlow == " yellow "){
System.out.println("invalid movement");return low;
}
}else{
low = " blue ";return low;
}
if(low == " blue "){
if(top == "red " || midup == "green " || midlow == "yellow "){
System.out.println("invalid movement");return low;
}
}else{
low = "blue ";return low;
}
if(midlow == "blue "){
System.out.println("No pillar to the left, where's it supposed to go?");
return low;
}
return low;
}
private static String moveBlueRight(String top,String midup,String midlow,String low){
if(low == "blue "){
if(top == " red " || midup == " green " || midlow == " yellow "){
System.out.println("invalid movement");return low;}
}else{
low = " blue ";return low;
}
if(low == " blue "){
if(top == " red" || midup == " green" || midlow == " yellow"){
System.out.println("invalid movement");return low;
}
}else{
low = " blue";return low;
}
if(low == " blue"){
System.out.println("No pillar to the right, where's it supposed to go?");
return low;
}
return low;
}
}
嘗試在字符串比較中使用「equals」而不是==。例如：if（low.equals（「blue」）{}等 –
天才！謝謝！ – Sirsarcastic
不客氣:)。保持良好的工作 –