我在 switch case 语句中有这个块，当它被选中时，它会中断并再次向我显示主菜单。
System.out.println("Choose a competitor surname");
String competitorChoice2 = input.nextLine();
int lowestSpeed = Integer.MAX_VALUE;
int highestSpeed = 0;
for(int j = 0; j < clipArray.length; j++) {
if(clipArray[j] != null) {
if(competitorChoice2.equals(clipArray[j].getSurname())) {
if(clipArray[j].getSpeed() > clipArray[highestSpeed].getSpeed()) {
highestSpeed = j;
}
}
}
}
for(int i = 0; i < clipArray.length; i++) {
if(clipArray[i] != null) {
if(competitorChoice2.equals(clipArray[i].getSurname())) {
if(clipArray[i].getSpeed() < clipArray[lowestSpeed].getSpeed()) {
lowestSpeed = i;
}
}
}
}
for(int h = lowestSpeed; h < highestSpeed; h++ ) {
System.out.println(""+clipArray[h].getLength());
}
我有一个对象数组，每个对象都有一个姓氏和一个速度。
我希望用户选择一个姓氏并从最低到最高显示他们所有剪辑的速度。
当我选择此选项时，它会中断并带我回到主菜单
速度最初也是作为浮点数输入的。
这是菜单：
while (true) {
System.out.println("Please select one of the following options by entering a number: \n"
+ "1) Quit\n"
+ "2) Add a new clip to the records\n"
+ "3) View information about a clip via an index number\n"
+ "4) Change information about a clip via an index number\n"
+ "5) List all competitors which have a clip recorded\n"
+ "6) Choose a competitor and display their longest clip\n"
+ "7) Choose a competitor and display their clips arranged by speed\n"
+ "8) display elements of array in alphabetical order");
choice = input.nextInt();
input.nextLine();
switch (choice) {
switch (choice) {
case (1):
System.out.println("You have quit the program");
System.exit(0);
case (2):
Clip c = new Clip();
System.out.println("Set an index number between 1-1000");
int setIndexNumber = input.nextInt();
c.setIndexNumber(setIndexNumber);
System.out.println("What is the given name of the competitor?");
String givenName = input.next();
c.setGivenName(givenName);
System.out.println("What is the surname of the competitor?");
String surname = input.next();
c.setSurname(surname);
System.out.println("What is the length of the clip?");
float setLength = input.nextFloat();
c.setLength(setLength);
System.out.println("What is the speed of the competitor?");
float setSpeed = input.nextFloat();
c.setSpeed(setSpeed);
System.out.println("What what time was this recorded? (24 hour)");
System.out.println("Enter hour: ");
int setHour = input.nextInt();
System.out.println("Enter minute: ");
int setMin = input.nextInt();
c.setTime(setHour, setMin);
clipArray[firstAvailableIndex()] = c;
counter++;
break;
case (3):
System.out.println("Which clip do you want to view?\n"
+ "Select from index 0-1000:");
int indexNo = input.nextInt();
for (int j = 0; j < clipArray.length; j++) {
if (j == indexNo) {
System.out.println("Index Number: " + clipArray[j].getIndexNumber());
System.out.println("Given Name: " + clipArray[j].getGivenName());
System.out.println("Surname: " + clipArray[j].getSurname());
System.out.println("Length: " + clipArray[j].getLength());
System.out.println("Speed: " + clipArray[j].getSpeed());
System.out.println("Time: " + clipArray[j].getHour() + ":" + clipArray[j].getMinute());
break;
}
}
break;
case (4):
System.out.println("Which clip do you want to change? choose and index number: ");
int clipIndex = input.nextInt();
input.nextLine();
System.out.println("What do want to set this given name to?");
String editGivenName = input.nextLine();
clipArray[clipIndex].setGivenName(editGivenName);
System.out.println("What do you want to set this surname to?");
String editSurname = input.nextLine();
clipArray[clipIndex].setSurname(editSurname);
System.out.println("What do you want to set this length to?");
float editLength = input.nextFloat();
clipArray[clipIndex].setLength(editLength);
System.out.println("What do you want to set this speed to?");
float editSpeed = input.nextFloat();
clipArray[clipIndex].setSpeed(editSpeed);
System.out.println("What do you want to set this hour to?");
int editHour = input.nextInt();
System.out.println("What do you want to set this minute to?");
int editMin = input.nextInt();
clipArray[clipIndex].setTime(editHour, editMin);
break;
case (5):
for (int g = 0; g < clipArray.length; g++) {
if (clipArray[g] != null) {
System.out.println(""+clipArray[g].getSurname());
}
}
break;
case (6):
System.out.println("Choose a competitor by surname");
String competitorChoice = input.nextLine();
int longestClip = 0;
for(int i = 0; i < clipArray.length; i++) {
if(clipArray[i] != null) {
if (competitorChoice.equals(clipArray[i].getSurname())) {
if(clipArray[i].getLength() > clipArray[longestClip].getLength()) {
longestClip = i;
}
}
}
}
System.out.println(""+clipArray[longestClip].getLength()+", at Index: "+clipArray[longestClip].getIndexNumber());
break;
case (7):
System.out.println("Choose a competitor surname");
String competitorChoice2 = input.nextLine();
int lowestSpeed = Integer.MAX_VALUE;
int highestSpeed = 0;
for(int j = 0; j < clipArray.length; j++) {
if(clipArray[j] != null) {
if(competitorChoice2.equals(clipArray[j].getSurname())) {
if(clipArray[j].getSpeed() > clipArray[highestSpeed].getSpeed()) {
highestSpeed = j;
}
}
}
}
for(int i = 0; i < clipArray.length; i++) {
if(clipArray[i] != null) {
if(competitorChoice2.equals(clipArray[i].getSurname())) {
if(clipArray[i].getSpeed() < clipArray[lowestSpeed].getSpeed()) {
lowestSpeed = i;
}
}
}
}
for(int h = lowestSpeed; h < highestSpeed; h++ ) {
System.out.println(""+clipArray[h].getLength());
}
break;
case (8):
for(int i = 1; i < counter; i++) {
for(int j = 0; j < counter - 1; j++) {
if(((clipArray[j].getSurname()).compareToIgnoreCase((clipArray[j+1].getSurname()))) > 0) {
Clip temp = clipArray[j];
clipArray[j] = clipArray[j+1];
clipArray[j+1] = temp;
}
}
}
for(int g = 0; g < counter; g++) {
System.out.println(clipArray[g].getSurname());
}
break;
default:
System.out.println("you have not selected a valid option");
break;
}//end of switch case
编辑：if语句中的最低速度越界异常