[英]How do I test delete() in the class growingArray
我正在学习 Java 中的 Growing Array,并在以下代码中实现了delete()
方法。
现在我想为示例数组[1,2,3,4,5,6,7]
测试此方法
我必须在Main
方法中写什么?
import java.util.Arrays;
public abstract class GrowingArray {
protected Object[] array;
protected static final int primaryQty = 10;
protected static final int secondaryQty = 5;
protected int index = 0;
public GrowingArray() {
array = new Object[primaryQty];
}
public GrowingArray(int size) {
array = new Object[size];
}
protected void grow() {
int oldsize = array.length;
int newsize = oldsize + secondaryQty;
Object[] loc = new Object[newsize];
for (int i = 0; i < oldsize; i++)
loc[i] = array[i];
array = loc;
}
public Object get(int at) {
return array[at];
}
public int getLength() {
return array.length;
}
public void add(Object obj) {
if (index < array.length)
array[index++] = obj;
else {
grow();
array[index++] = obj;
}
}
public void delete(int x) {
for (int i = x; i < array.length; i++) {
if (i == array.length - 1) {
array[i] = null;
System.out.println(array.toString());
} else {
array[i] = array[i + 1];
System.out.println(array.toString());
}
}
}
@Override
public boolean equals(Object obj) {
if (obj instanceof GrowingArray) {
return Arrays.equals(array, ((GrowingArray) obj).array);
}
return false;
}
@Override
public String toString() {
return Arrays.toString(array);
}
public static void main(String args[]) {
//test ?????
}
}
你的课是抽象的。 从类定义中删除抽象。
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