今天再写一个类
是一个学生类
但是有一个错误没有解决
希望有大佬抬我一手
这是Student类的实现
package a20200722;
public class Student {
private char[] no;
private char[] name;
private int age;
public static int sum = 0;
Student(char[] a,char[] b,int c){
int i,j;
this.age=c;
for(i=0;i<a.length;i++)
{
this.no[i]=a[i];
}
no[i+1]=' ';
for(j=0;j<b.length;j++)
{
this.name[j]=b[j];
}
name[j+1]=' ';
sum++;
System.out.print("Constructor run");
System.out.print("NumTotal:"+sum);
}
Student(Student a){
int i,j;
for(i=0;i<a.no.length;i++)
{
this.no[i]=a.no[i];
}
no[i+1]=' ';
for(j=0;j<a.name.length;j++)
{
this.name[j]=a.name[j];
}
name[j+1]=' ';
sum++;
System.out.print("CopyConstructor run");
}
Student(){
this.no=null;
this.name=null;
age=0;
System.out.print("Constructor run");
}
public void finalize() {
System.out.print("Destructor run");
System.out.print("NumTotal:"+sum);
}
public void setNo(char a[]) {
int i;
for(i=0;i<a.length;i++)
{
this.no[i]=a[i];
}
this.no[i+1]=' ';
}
public void setNo() {
this.no=null;
}
public void setName(char a[]) {
int i;
for(i=0;i<a.length;i++)
{
this.name[i]=a[i];
}
this.name[i+1]=' ';
}
public void setName() {
this.name=null;
}
public char[] getNo() {
return this.no;
}
public char[] getName() {
return this.name;
}
public void setAge(int a) {
this.age=a;
}
public void setAge() {
this.age=0;
}
public int getAge() {
return this.age;
}
public void show() {
System.out.print("No:");
for(int i=0;i<this.no.length;i++) {
System.out.print(this.no[i]);
}
System.out.print(",Name:");
for(int j=0;j<this.name.length;j++) {
System.out.print(this.name[j]);
}
System.out.print(",Age:"+this.age);
}
}
private char[] no;
private char[] name;
private int age;
public static int sum = 0;
Student(char[] a,char[] b,int c){
int i,j;
this.age=c;
for(i=0;i<a.length;i++)
{
this.no[i]=a[i];
}
no[i+1]=' ';
for(j=0;j<b.length;j++)
{
this.name[j]=b[j];
}
name[j+1]=' ';
sum++;
System.out.print("Constructor run");
System.out.print("NumTotal:"+sum);
}
Student(Student a){
int i,j;
for(i=0;i<a.no.length;i++)
{
this.no[i]=a.no[i];
}
no[i+1]=' ';
for(j=0;j<a.name.length;j++)
{
this.name[j]=a.name[j];
}
name[j+1]=' ';
sum++;
System.out.print("CopyConstructor run");
}
Student(){
this.no=null;
this.name=null;
age=0;
System.out.print("Constructor run");
}
public void finalize() {
System.out.print("Destructor run");
System.out.print("NumTotal:"+sum);
}
public void setNo(char a[]) {
int i;
for(i=0;i<a.length;i++)
{
this.no[i]=a[i];
}
this.no[i+1]=' ';
}
public void setNo() {
this.no=null;
}
public void setName(char a[]) {
int i;
for(i=0;i<a.length;i++)
{
this.name[i]=a[i];
}
this.name[i+1]=' ';
}
public void setName() {
this.name=null;
}
public char[] getNo() {
return this.no;
}
public char[] getName() {
return this.name;
}
public void setAge(int a) {
this.age=a;
}
public void setAge() {
this.age=0;
}
public int getAge() {
return this.age;
}
public void show() {
System.out.print("No:");
for(int i=0;i<this.no.length;i++) {
System.out.print(this.no[i]);
}
System.out.print(",Name:");
for(int j=0;j<this.name.length;j++) {
System.out.print(this.name[j]);
}
System.out.print(",Age:"+this.age);
}
}
这是主函数的实现
package a20200722;
import a20200722.Student;
public class Studentmain {
public static void main(String[] args) {
char[] s1 = {'2','0','1','9','0','3','2','7'};
char[] s2 = {'d','o','u','b','l','e','b','e','s','t'};
Student stu1=new Student(s1,s2,0);
stu1.setAge(21);
stu1.show();
Student stu2=stu1;
stu2.setNo(s1);
stu2.setName(s2);
stu2.show();
stu1=null;
stu2=null;
System.gc();
}
}
import a20200722.Student;
public class Studentmain {
public static void main(String[] args) {
char[] s1 = {'2','0','1','9','0','3','2','7'};
char[] s2 = {'d','o','u','b','l','e','b','e','s','t'};
Student stu1=new Student(s1,s2,0);
stu1.setAge(21);
stu1.show();
Student stu2=stu1;
stu2.setNo(s1);
stu2.setName(s2);
stu2.show();
stu1=null;
stu2=null;
System.gc();
}
}