问题描述
这就是我到目前为止所做的。这个程序基本上是做用户输入(他们的社会安全号码),验证他们的输入是在正确的格式(XXX-XX-XXXX),将验证的输入添加到数组列表。现在最后一步是创建一个toString()方法,该方法将返回一个人类可读的字符串表示形式,添加到数组中的所有社会安全号码。此方法必须使用for循环,并且每行必须打印1个社会安全号码条目。例如:您输入的社会安全号码是:
345-43-5674
456-62- 8435
910-70-0053
package SSNServerStorage;
public class SSNArray
{
private String [] SSNNumber;
private int arrayCount;
public SSNArray(){
SSNNumber = new String [300];
arrayCount = 0;
$ b $ public SSNArray(int arraySize){
SSNNumber = new String [arraySize];
arrayCount = 0;
public String [] getSSNNumber(){
return SSNNumber;
}
public int getArrayCount(){
return arrayCount;
$ b $ public boolean validateSSNNumber(String SSNFormat){
return SSNFormat.matches(\\ {3} -\\ {2} \\\d {4});
$ b $ public String addSSN(String SSNFormat){$ b $ if(validateSSNNumber(SSNFormat)){
return SSNNumber [arrayCount ++] = SSNFormat;
} else {
return null;
$ b $ public String toString(){
System.out.println(您输入的社会安全号码是:); ()
{
//
//
//
//
}
}
您可以声明一个字符串
来连接所有的SS号。
@Override
public String toString(){
String str =您输入的社会安全号码是:\ n;
for(int x = 0; x str + = SSNumber [x] +\\\
;
return str;
$ b $ p $因为它是一个 toString()
方法,你将要返回类的字符串表示,而不是做 println()
。
This is what I have so far. What this program basically does is take user input(their social security numbers), verifies that their input is in the proper format (XXX-XX-XXXX), adds the verified input to the arrays list. Now the final step is to create a toString() method that will return a human readable String representation of all social security numbers added to the array. This method must use a for loop, and must print 1 social security number entry per line. For example:
"The Social Security Numbers you entered are:
345-43-5674
456-62-8435
910-70-0053"
package SSNServerStorage;
public class SSNArray
{
private String[] SSNNumber;
private int arrayCount;
public SSNArray(){
SSNNumber = new String[300];
arrayCount = 0;
}
public SSNArray(int arraySize){
SSNNumber = new String[arraySize];
arrayCount = 0;
}
public String[] getSSNNumber(){
return SSNNumber;
}
public int getArrayCount(){
return arrayCount;
}
public boolean validateSSNNumber(String SSNFormat){
return SSNFormat.matches("\\d{3}-\\d{2}-\\d{4}");
}
public String addSSN(String SSNFormat){
if (validateSSNNumber(SSNFormat)){
return SSNNumber[arrayCount++] = SSNFormat;
}else{
return null;
}
}
public String toString(){
System.out.println("The Social Security Numbers you entered are:");
for()
{
//
//
//
//
}
}
}
解决方案 You can declare a String
to concatenate all the SSNumbers.
@Override
public String toString(){
String str = "The Social Security Numbers you entered are:\n";
for(int x=0; x< arrayCount; x++)
str += SSNumber[x] + "\n";
return str;
}
Since it is a toString()
method, you will want to return the string representation of the class instead of doing println()
.
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