如何修改由数组Java程序的ArrayList对象? [英] How to modify a java program from arrays to arraylist objects?
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问题描述
// sets up random number of markers in a
// one-dimensional array
// numMarkers markers in a board of size boardSize
public class SimpleDotCom
{
// constants
private final static int DEFAULT_MARKERS = 3;
private final static int DEFAULT_BOARD_SIZE = 10;
// data members
private int[] markers; // stores the marker positions
private int boardSize; // stores the size of the board
private int endOfMarkers;
// default constructor
// 3 markers in a board of 10
public SimpleDotCom()
{
this( DEFAULT_MARKERS, DEFAULT_BOARD_SIZE );
}
// constructor to set up
// numMarkers and boardSize
public SimpleDotCom( int numMarkers, int boardSize )
{
markers = new int[numMarkers];
this.boardSize = boardSize;
endOfMarkers = markers.length - 1;
int i, j, randNum;
int[] original = new int[boardSize];
for ( i = 0; i < original.length; i++ )
original[i] = i;
// scramble original
for ( i = original.length - 1;
i >= original.length - markers.length;
i-- )
{
randNum = (int) (Math.random() * (i+1) );
// swap original[i] and original[randNum]
j = original[i];
original[i] = original[randNum];
original[randNum] = j;
}
for ( i = 0; i < markers.length; i++ )
markers[i] = original[i+original.length-markers.length];
} // end SimpleDotCom
// check if the guess is a hit or a miss
// precondition: guess is valid
public String checkYourself( int guess )
{
for ( int i = 0; i <= endOfMarkers; i++ )
if ( markers[i] == guess )
{
markers[i] = markers[endOfMarkers];
endOfMarkers--;
return "Hit";
}
return "Miss";
} // end checkYourself
// returns the number of markers in the game
public int numberOfMarkers()
{
return markers.length;
} // end numberOfMarkers
// returns the size of the board
public int sizeOfBoard()
{
return boardSize;
} // end sizeOfBoard
} // end SimpleDotCom
这是我需要修改程序。我修改阵列,ArrayList对象,我不知道该怎么做。任何信息/ adive是有帮助的。如果您需要了解什么ELES问,我会让你知道。再次感谢您的帮助。
That is the program that I need to modify. I am to modify the arrays to arraylist objects and I don't know how to do it. Any information/adive is helpful. If you need to know anything eles ask and I will let you know. Again thanks for your help.
推荐答案
通过改变标记
式启动:
private ArrayList<Integer> markers;
您IDE现在应该告诉你,因为的ArrayList
和数组是不能互换的一大堆错误。修复这些错误,你就大功告成了。
Your IDE should now show you a whole lot of errors since ArrayList
and arrays are not interchangeable. Fix those errors, and you’re done.
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