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該程序爲類創建各種方法並運行每種方法。當我運行這些方法時,雖然輸入的整數值肯定會傳遞給對象(我使用print語句進行測試),但返回語句在方法中不起作用。我相信這個問題在我的靜態聲明中。 任何人都可以幫忙嗎?Java程序:返回語句不工作
import java.util.Scanner;
public class MyInteger {
public static int storedValue;
public int value;
public static void main(String[] args){
Scanner input = new Scanner(System.in);
System.out.println("Class with various methods test. Please enter an integer:");
int num = input.nextInt();
MyInteger x = new MyInteger(num);
storedValue = x.value;
System.out.println("Now performing returnInt");
x.returnInt();
System.out.println("Now performing isEven");
x.isEven();
}
MyInteger(int a){
value = a;
}
public int returnInt(){
return storedValue;
}
public boolean isEven(){
if(value % 2 == 0){
return true;
}
else{
return false;
}
}
public boolean isOdd(){
if(value % 2 != 0){
return true;
}
else{
return false;
}
}
public boolean isPrime(){
if (value == 2){
return true;
}
for (int i = 2; i < value;i++){
if (value % i == 0){
return false;
}
}
return true;
}
public boolean isEven(int a){
if (a % 2 == 0){
return true;
}
else{
return false;
}
}
public boolean isOdd(int a){
if (a % 2 != 0){
return true;
}
else{
return false;
}
}
public boolean isPrime(int a){
if (a == 2){
return true;
}
for (int i = 2; i < a;i++){
if (a % i == 0){
return false;
}
}
return true;
}
public boolean isEven(MyInteger a){
if (a.value % 2 == 0){
return true;
}
else{
return false;
}
}
public boolean isOdd(MyInteger a){
if (a.value % 2 != 0){
return true;
}
else{
return false;
}
}
public boolean isPrime(MyInteger a){
if (a.value == 2){
return true;
}
for (int i = 2; i < a.value;i++){
if (a.value % i == 0){
return false;
}
}
return true;
}
public boolean equals(int a){
if (value == a){
return true;
}
else{
return false;
}
}
public boolean equals(MyInteger a){
if (value == a.value){
return true;
}
else{
return false;
}
}
public int parseInt(String s, int radix){
for (int i = (s.length()-1); i >= 0; i--){
radix += (int)s.charAt(i)*(Math.pow(10, i));
}
return radix;
}
}
_do not work_是什麼意思? –
簡化:'公共布爾isEven(){返回值%2 == 0; }'。對於ifOdd,只需返回'!isEven();'和....'public boolean equals(int a){return value == a; }'等... –