本文介绍了如何将java程序从数组修改为arraylist对象?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
限时送ChatGPT账号..// 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
那是我需要修改的程序.我要将数组修改为 arraylist 对象,但我不知道该怎么做.任何信息/广告都是有帮助的.如果你需要知道什么eles问,我会告诉你的.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
从改变markers
的类型开始:
private ArrayList<Integer> markers;
您的 IDE 现在应该会向您显示大量错误,因为 ArrayList
和数组不可互换.修复这些错误,您就大功告成了.
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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