高手帮改一个很小的程序
Java code
package control;
public class MakeArrary
{
public static int[] Test(int statr,int end)
{
int[] z = null;
if(statr<=end)
{
int y=end-statr;
for(int x=statr,i=0;x<=y;x++,i++)
{
z[0+i]=x;
}
}
else
{
z=null;
}
return z;
}
public static void main(String[] args)
{
int[] z=Test(1,100);
int y=z.length;
for(int x=0;x<=y-1;x++)
{
System.out.print(z[x]);
}
}
}
------解决方案--------------------
public static int[] test(int statr, int end) {
int[] z = null;
if (statr <= end) {
int y = end - statr;
z = new int[y];
for (int x = statr, i = 0; x <= y; x++, i++) {
z[0 + i] = x;
}
} else {
z = null;
}
return z;
}
public static void main(String[] args) {
int[] z = test(1, 100);
int y = z.length;
for (int x = 0; x <= y - 1; x++) {
System.out.print(z[x]);
}
}
你的int数组没有初始化长度,而是null,所以会报
空指针错误,增加红色的代码