标记是一个关键字或标签,用于将您的问题与其他类似问题进行分类。标记是一个关键字或标签,用于将您的问题与其他类似问题进行分类。
答案 0 :(得分:1)
在以下三个代码块中,我将首先编写您的行,然后编写它应该是什么:
String[] sort = new String[listNames];
String[] sort = new String[listNames.length];
^^^^^^^
for (int x = 0; x < sort; x++) {
for (int x = 0; x < sort.length; x++) {
^^^^^^^
sort[x] = JOptionPane.showMessageDialog(" Tutor LAST NAME and FIRST NAME Listed in Alphabetically Order"+(x+1)+ " " + "For example: 'Smith, John'");
sort[x] = JOptionPane.showMessageDialog(null, " Tutor LAST NAME and FIRST NAME Listed in Alphabetically Order"+(x+1)+ " " + "For example: 'Smith, John'");
^^^^^
假设您真的想在排序之前创建一个新数组,那么您的方法应该是:
public static String[] sortNames(String[] listNames) {
String[] copy = Arrays.copyOf(listNames, listNames.length);
Arrays.sort(copy);
return copy;
}
如果必须是方法,但您不必创建第二个数组,则可以这样做:
public static void sortNames(String[] listNames) {
Arrays.sort(listNames);
}
答案 1 :(得分:0)
你应该改变
for (int x = 0; x < sort; x++)
到
for (int x = 0; x < sort.length; x++)
代替。和
String[] sort = new String[listNames];
到
String[] sort = new String[listNames.length];
此外,JOptionPane.showMessageDialog()
应该以这种方式使用:
JOptionPane.showMessageDialog(null," Tutor LAST NAME and FIRST NAME Listed in Alphabetically Order"+(x+1)+ " " + "For example: 'Smith, John'");