Java 从ArrayList打印
我接收一个文本文件并将每个单词存储在arraylist中。然而,问题是,当我遍历arraylist并打印内容时,单词出现了很多次,而且顺序不一定正确。下面是一段代码:Java 从ArrayList打印,java,Java,我接收一个文本文件并将每个单词存储在arraylist中。然而,问题是,当我遍历arraylist并打印内容时,单词出现了很多次,而且顺序不一定正确。下面是一段代码: public static void main(String args[]) { try { ArrayList storeWord = new ArrayList(); Scanner scannerWord = new Scanner
public static void main(String args[])
{
try
{
ArrayList storeWord = new ArrayList();
Scanner scannerWord = new Scanner(new File("word"));
while(scannerWord.hasNext()) {
String word = scannerWord.next();{
storeWord.add(word);
Iterator itr = storeWord.iterator();
while(itr.hasNext())
System.out.println(itr.next());
}
有人知道问题可能是什么以及如何解决吗?
谢谢。每次阅读都会打印出完整的列表。这可能就是为什么每个单词都会显示多次 您可能需要:
Scanner scannerWord = new Scanner(new File("word"));
while(scannerWord.hasNext()) {
String word = scannerWord.next();{
storeWord.add(word);
}
Iterator itr = storeWord.iterator();
while(itr.hasNext())
System.out.println(itr.next());
你每次阅读都会打印出你的全部清单。这可能就是为什么每个单词都会显示多次 您可能需要:
Scanner scannerWord = new Scanner(new File("word"));
while(scannerWord.hasNext()) {
String word = scannerWord.next();{
storeWord.add(word);
}
Iterator itr = storeWord.iterator();
while(itr.hasNext())
System.out.println(itr.next());
您需要将迭代器和打印while循环从原始while循环中取出您需要将迭代器和打印while循环从原始while循环中取出尝试以下操作
public static void main(String args[]) {
ArrayList storeWord = new ArrayList();
Scanner scannerWord = new Scanner(new File("word"));
while(scannerWord.hasNext()) {
storeWord.add(scannerWord.next());
}
Iterator itr = storeWord.iterator();
while(itr.hasNext()){
System.out.println(itr.next());
}
}
“打印”循环嵌套在“读取”循环中 试试这个
public static void main(String args[]) {
ArrayList storeWord = new ArrayList();
Scanner scannerWord = new Scanner(new File("word"));
while(scannerWord.hasNext()) {
storeWord.add(scannerWord.next());
}
Iterator itr = storeWord.iterator();
while(itr.hasNext()){
System.out.println(itr.next());
}
}
“打印”循环嵌套在“读取”循环中