public class erfensort{
public static void main(String args[]){
int length = 10;
Array_erfen ef = new Array_erfen(length);
ef.insert(1);
ef.insert(2);
ef.insert(3);
ef.insert(4);
ef.insert(6);
ef.insert(7);
ef.insert(8);
ef.insert(9);
int keyWord = 5;
if(ef.erfen(keyWord,0,length-1) == -1){
System.out.println("Can Not Find The Value");
}else{
System.out.println("Hava Find The Value:" + keyWord);
}
}
}
class Array_erfen {
int[] array;
int index = 0;
public Array_erfen(int length){
array = new int[length];
}
public void insert(int value){
array[index] = value;
index++;
}
public int erfen(int keyValue,int lowBound,int uperBound){
int curIn = (lowBound+uperBound)/2;
if(lowBound > uperBound){
return -1;
}
if(array[curIn]==keyValue){
return keyValue;
}else if(array[curIn] < keyValue){
return erfen(keyValue,curIn++,uperBound);
}else{
return erfen(keyValue,lowBound,curIn--);
}
}
}
系统报错：Exception in thread "main" java.lang.StackOverflowError
请问是为什么呢？？？
------解决方案--------------------
- Java code
public class erfensort{ public static void main(String args[]){ int length = 10; Array_erfen ef = new Array_erfen(length); ef.insert(1); ef.insert(2); ef.insert(3); ef.insert(4); ef.insert(6); ef.insert(7); ef.insert(8); ef.insert(9); int keyWord = 9; if(ef.erfen(keyWord,0,length-1) == -1){ System.out.println("Can Not Find The Value"); }else{ System.out.println("Hava Find The Value:" + keyWord); } } }class Array_erfen {//erfen是什么的简称，你拿你家99只猫命名，又不做注释 int[] array; int index = 0; public Array_erfen(int length) { array = new int[length]; } public void insert(int value) { if(index>=0 && index<array.length){ array[index] = value; index++; } else throw new UnsupportedOperationException("数组越界"); } public int erfen(int keyValue, int lowBound, int highBound) { int curIn = (lowBound + highBound) / 2; if (lowBound > highBound) { return -1; } if (array[curIn] == keyValue) { return keyValue; } else if (array[curIn] < keyValue) { curIn++;////////////////////////////////////////////////////////注意Java中前置++和后置++的用法 return erfen(keyValue,curIn , highBound); } else { curIn--;////////////////////////////////////////////////////////注意Java中前置--和后置--的用法 return erfen(keyValue, lowBound,curIn ); } }}
------解决方案--------------------
return erfen(keyValue,curIn++,uperBound);
return erfen(keyValue,lowBound,curIn--);
这里是不是有问题吧，改成下面应该没问题了
return erfen(keyValue,curIn+1,uperBound);
return erfen(keyValue,lowBound,curIn-1);