Java 当我在数组大小中输入数字时,项目工作正常,但当我输入int subNo时,不会给我错误
我是这个领域的新手Java 当我在数组大小中输入数字时,项目工作正常,但当我输入int subNo时,不会给我错误,java,arrays,Java,Arrays,我是这个领域的新手 package test; import java.util.Scanner; public class Subject { public static void main(String [] args){ System.out.println("Please Enter Subject No"); subNo =scan.nextInt(); System.out.println("Subject No Is
package test;
import java.util.Scanner;
public class Subject {
public static void main(String [] args){
System.out.println("Please Enter Subject No");
subNo =scan.nextInt();
System.out.println("Subject No Is : " + subNo);
for (int i = 0; i < subNo; i++) {
System.out.println("Please Enter Subject Name " + (i + 1));
subName[i] = scan.next();
}
}
public static int subNo;
public static String[] subName = new String [subNo] ;
static Scanner scan = new Scanner (System.in);
}
封装测试;
导入java.util.Scanner;
公共课科目{
公共静态void main(字符串[]args){
System.out.println(“请输入主题号”);
subNo=scan.nextInt();
System.out.println(“受试者编号:“+subNo”);
对于(int i=0;i
您必须在读取subNo
后初始化数组:
public static String[] subName;//<---------------not initialize it here
static Scanner scan = new Scanner(System.in);
public static void main(String[] args) {
System.out.println("Please Enter Subject No");
subNo = scan.nextInt();
subName = new String[subNo];//<------------------initialize it here
System.out.println("Subject No Is : " + subNo);
公共静态字符串[]子名称// 必须在subNo
变量之后定义subName
变量,因为这将在输入值后分配,例如:
public static int subNo;
static Scanner scan = new Scanner(System.in);
public static void main(String[] args) {
System.out.println("Please Enter Subject No");
subNo = scan.nextInt();
System.out.println("Subject No Is : " + subNo);
String[] subName = new String[subNo];
for (int i = 0; i < subNo; i++) {
System.out.println("Please Enter Subject Name " + (i + 1));
subName[i] = scan.next();
}
}
公共静态int subNo;
静态扫描仪扫描=新扫描仪(System.in);
公共静态void main(字符串[]args){
System.out.println(“请输入主题号”);
subNo=scan.nextInt();
System.out.println(“受试者编号:“+subNo”);
String[]subName=新字符串[subNo];
对于(int i=0;i
这里有我遗漏的问题吗?公共静态字符串[]子名称=新字符串[subNo]
-subNo
在此声明中为0
。感谢您回复YCF\L,它帮助我和我学到了一些新的东西欢迎您@Hemasharshar享受java好运(ya akhi al-karim);)谢谢你回复JUAN CALVOPINA M,你的信息对我很有帮助