英文:
java.util.LinkedHashMap$LinkedKeyIterator infinite loop in LinkedHashSet
问题
System.out.print("输入链哈希集合的大小：");Scanner s = new Scanner(System.in); // 创建一个 Scanner 对象int size = s.nextInt();HashSet<String> lhashset = new HashSet<>(size);for (int i = 0; i < size; i++) {System.out.print("输入姓名：");String name = s.next();lhashset.add(name);}System.out.println("\n输入你想查找的姓名：");String find = s.next();if (lhashset.contains(find)) {System.out.println("\n是的，链哈希集合包含" + find);System.out.print("你想要移除这个姓名吗？");String ch = s.next();String choice = "yes";if (ch.equals(choice)) {lhashset.remove(find);System.out.println("\n元素已移除。");} else {System.out.println("\n再见");}} else {System.out.println("不包含这个姓名。");}
第一个 if 语句正常工作，但是当我尝试进入 else 语句（打印"不包含"）时，根据标题的描述，我陷入了无限循环。对于嵌套的 if 语句也是一样的。
英文:
System.out.print("Enter the size of linked hash set: ");Scanner s = new Scanner(System.in); // Create a Scanner objectint size = s.nextInt();HashSet<String> lhashset = new HashSet<>(size);for(int i=0; i<size; i++){System.out.print("Enter the name: ");String name = s.next();lhashset.add(name);}System.out.println("\nEnter the name you want to find: ");String find = s.next();if(lhashset.contains(find)){System.out.println("\nYes the Linked Hash Set contains " +find);System.out.print("Do you want to remove the name? ");String ch = s.next();String choice = "yes";if(ch.equals(choice)){lhashset.remove(find);System.out.println("\nElement removed.");}else{System.out.println("\nGoodbye");}}else{System.out.println("Does not contain name.");}
The first if statement works fine, but when I try to go to else statement(print"does not contain"), I get an infinite loop as per the heading. The same happens for the nested if statement.
答案1
得分: 0
ch.equals(choice) 将无法工作。 使用正确的语法更新代码。public class Soln {public static void main(String[] args) {Scanner s = new Scanner(System.in); // 创建一个 Scanner 对象HashSet<String> lhashset = new HashSet<>();lhashset.add("TEST");System.out.println("\n输入您想要查找的名称：");String find = s.next();if (lhashset.contains(find)) {System.out.println("\n是的，Linked Hash Set 包含 " + find);System.out.print("您想要移除这个名称吗？ ");int ch = s.nextInt();if (ch == 1) {lhashset.remove(find);System.out.println("\n元素已移除。");} else {System.out.println("\n再见");}} else {System.out.println("不包含该名称。");}}}
英文:
ch.equals(choice) will not work. Updating the code with correct syntax.
public class Soln {public static void main(String[] args) {Scanner s = new Scanner(System.in); // Create a Scanner objectHashSet<String> lhashset = new HashSet<>();lhashset.add("TEST");System.out.println("\nEnter the name you want to find: ");String find = s.next();if(lhashset.contains(find)){System.out.println("\nYes the Linked Hash Set contains " +find);System.out.print("Do you want to remove the name? ");int ch = s.nextInt();if(ch == 1){lhashset.remove(find);System.out.println("\nElement removed.");}else{System.out.println("\nGoodbye");}}else{System.out.println("Does not contain name.");}}}
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