import java.util.*;
class ManOne{
Scanner scanner=new Scanner(System.in);
String name;
boolean sex;
long num;
ManOne ob[]=new ManOne[2];
String informationgroup[]=new String[2];
void getin(){
for(int i=0;i<ob.length;i++){
System.out.println("Input the man's name");
ob[i].name=scanner.nextLine();
System.out.println("Input the man's sex");
ob[i].sex=scanner.nextBoolean();
scanner.nextLine();
System.out.println("Input the man's num");
ob[i].num=scanner.nextLong();
scanner.nextLine();
}
}
public String toString(int i){
return "the name is"+ ob[i].name+"the sex is "+ob[i].sex+"the num is"+num;
}
void savetheinformation(){
for(int i=0;i<informationgroup.length;i++){
informationgroup[i]=ob[i].toString(i);
}
}
void shower(){
for(int i=0;i<informationgroup.length;i++){
System.out.println(informationgroup[i]);
}
}
void settheinformation(){
System.out.println("Input the man's name");
name=scanner.nextLine();
System.out.println("Input the man's sex");
sex=scanner.nextBoolean();
scanner.nextLine();
System.out.println("Input the man's num");
num=scanner.nextLong();
scanner.nextLine();
}
String getMenber(String name){
if(this.name.endsWith(name)){
return name;
}
else{
return null;
}
}
}
public class TestForManone {
public static void main(String args[]){
ManOne A=new ManOne();
A.getin();
A.savetheinformation();
A.shower();
}}
class ManOne{
Scanner scanner=new Scanner(System.in);
String name;
boolean sex;
long num;
ManOne ob[]=new ManOne[2];
String informationgroup[]=new String[2];
void getin(){
for(int i=0;i<ob.length;i++){
System.out.println("Input the man's name");
ob[i].name=scanner.nextLine();
System.out.println("Input the man's sex");
ob[i].sex=scanner.nextBoolean();
scanner.nextLine();
System.out.println("Input the man's num");
ob[i].num=scanner.nextLong();
scanner.nextLine();
}
}
public String toString(int i){
return "the name is"+ ob[i].name+"the sex is "+ob[i].sex+"the num is"+num;
}
void savetheinformation(){
for(int i=0;i<informationgroup.length;i++){
informationgroup[i]=ob[i].toString(i);
}
}
void shower(){
for(int i=0;i<informationgroup.length;i++){
System.out.println(informationgroup[i]);
}
}
void settheinformation(){
System.out.println("Input the man's name");
name=scanner.nextLine();
System.out.println("Input the man's sex");
sex=scanner.nextBoolean();
scanner.nextLine();
System.out.println("Input the man's num");
num=scanner.nextLong();
scanner.nextLine();
}
String getMenber(String name){
if(this.name.endsWith(name)){
return name;
}
else{
return null;
}
}
}
public class TestForManone {
public static void main(String args[]){
ManOne A=new ManOne();
A.getin();
A.savetheinformation();
A.shower();
}}
String informationgroup[]=new String[2];有这么写程序呢么????括号呢???
for(int i = 0; i < ob.length;i++)
{
ob[i] = new ManOne();
}
你需要如上初始化
这个需要初始化里面的对象啊兄弟,你只是创建了一个数组,但是数据里面没有初始化,所以[null,null]然后你用null来获取name属性,肯定就会空指针了。帮你改了一下class ManOne {
Scanner scanner = new Scanner(System.in);
String name;
boolean sex;
long num;
ManOne ob[] = new ManOne[2];
String informationgroup[] = new String[2];
void getin() {
for (int i = 0; i < ob.length; i++) {
System.out.println("Input the man's name");
ob[i].name = scanner.nextLine();
System.out.println("Input the man's sex");
ob[i].sex = scanner.nextBoolean();
scanner.nextLine();
System.out.println("Input the man's num");
ob[i].num = scanner.nextLong();
scanner.nextLine();
}
} public String toString(ManOne[] ob,int i) {
return "the name is " + ob[i].name + " the sex is " + ob[i].sex
+ " the num is" + num;
} void savetheinformation(ManOne[] ob) {
for (int i = 0; i < informationgroup.length; i++) {
informationgroup[i] = ob[i].toString(ob,i);
}
} void shower() {
for (int i = 0; i < informationgroup.length; i++) {
System.out.println(informationgroup[i]);
}
} void settheinformation() {
System.out.println("Input the man's name");
name = scanner.nextLine();
System.out.println("Input the man's sex");
sex = scanner.nextBoolean();
scanner.nextLine();
System.out.println("Input the man's num");
num = scanner.nextLong();
scanner.nextLine();
} String getMenber(String name) {
if (this.name.endsWith(name)) {
return name;
} else {
return null;
}
}}public class TestForManone {
public static void main(String args[]) {
ManOne A = new ManOne();
for(int i = 0; i < A.ob.length; i++){
A.ob[i] = new ManOne();
}
A.getin();
A.savetheinformation(A.ob);
A.shower();
}
}