java错误:变量可能尚未初始化?
尝试创建将RGB颜色代码转换为其等效十六进制代码的代码。到目前为止,我只完成了前两个字符的if语句,但我得到了错误:
托赫克斯。java:62:错误:变量digitOne可能尚未初始化 系统出来println(“前两个字符为:“+digitOne+digitTwo”); ^ 托赫克斯。java:62:错误:变量digitTwo可能尚未初始化 系统出来println(“前两个字符为:“+digitOne+digitTwo”)
这是到目前为止我的代码的主要部分:
try{
int red, green, blue;
System.out.print("Please enter three numbers representing RGB values: ");
red = myScanner.nextInt();
green = myScanner.nextInt();
blue = myScanner.nextInt();
if(red>=0 && red<=255 && green>=0 && green<=255 && blue>=0 && blue<=255){
int firsthexRed = (int)(red/16);
int redremainder = red%16;
int firsthexGreen = (int)(green/16);
int greenremainder = green%16;
int firsthexBlue = (int)(blue/16);
int blueremainder = blue%16;
String digitOne, digitTwo, digitThree, digitFour, digitFive, digitSix;
if(firsthexRed>=0 && firsthexRed<=9){ //if statement for first hex character
digitOne = Integer.toString(firsthexRed);
}else if (firsthexRed==10){
digitOne = "A";
}else if (firsthexRed==11){
digitOne = "B";
}else if (firsthexRed==12){
digitOne = "C";
}else if (firsthexRed==13){
digitOne = "D";
}else if (firsthexRed==14){
digitOne = "E";
}else if (firsthexRed==15){
digitOne = "F";
}
if(redremainder>=0 && redremainder<=9){ //if statement for second hex character
digitTwo = Integer.toString(redremainder);
}else if (redremainder==10){
digitTwo = "A";
}else if (redremainder==11){
digitTwo = "B";
}else if (redremainder==12){
digitTwo = "C";
}else if (redremainder==13){
digitTwo = "D";
}else if (redremainder==14){
digitTwo = "E";
}else if (redremainder==15){
digitTwo = "F";
}
System.out.println("The first two characters are: "+digitOne+digitTwo);
}else{
System.out.println("You did not enter integers between 0-255 (inclusive).");
}
}catch(RuntimeException ex){
System.out.println("Sorry, your input must consist of integers.");
}
}
}^ ^
# 1 楼答案
不用担心,我所要做的就是把最后一个else if语句改成else语句,这样编译器就知道digitOne,digitTwo总是等于某个东西