In this quick article, we'll look at different ways to remove the last character of a string in Java.Using String.substring()The easiest and quickest way to remove the last character from a string is by using the String.substring() method. Here is an example:...
JavaObject Oriented ProgrammingProgramming Use the Trim() method to remove leading and trailing whitespace from a string. Let’s say the following is our string with white spaces in the beginning and the end. String str = " a "; Now, use the trim() method. str.trim() The following is...
//remove13和remove14完全一样,均可正确删除。 publicstaticvoidremove13(List<String> list, String target){intsize = list.size();for(inti = size -1; i >=0; i--){ String item = list.get(i);if(target.equals(item)){ list.remove(item); } } print(list); } publicstaticvoidremove14(L...
To remove non-alphanumeric characters in a given string in Java, we have three methods; let’s see them one by one. Method 1: Using ASCII values If we see the ASCII table, characters from ‘a’ to ‘z’ lie in the range 65 to 90. Characters from ‘A’ to ‘Z’ lie in the ra...
String str=iterator.next();//读取当前集合数据元素if("b".equals(str)){//all.remove(str);//使用集合当中的remove方法对当前迭代器当中的数据元素值进行删除操作(注:此操作将会破坏整个迭代器结构)使得迭代器在接下来将不会起作用iterator.remove(); ...
publicstaticvoidmain(String[]args){List<String>list=newArrayList<>();list.add("1");list.add("2");list.add("3");for(String s:list){if(s.equals("2")){list.remove(s);}}System.out.println(list);} 运行结果如下: 为什么会出现这种情况,我删除第一个元素不行,删除第二个元素好用,删除第...
问用Java实现remove() Iterator方法EN所以我正在使用一个通用的LinkedList，我需要能够使用迭代器来删除它...
public Student(String name, int id) { = name; this.id = id; } @Override public String toString() { return "Student [name=" + name + ", id=" + id + "]"; } } ArrayList<Student> array = new ArrayList<>(); array.add(new Student("zhang1",1)); ...
String arr = new String3; List list = new ArrayList(Arrays.asList(arr)); 2.6、使用while循环 使用while循环,删除了元素,索引便不+1,在没删除元素时索引+1 int i=0; while (i<list.size()) if (i % 2 == 0) list.remove(i); else ...
Iterator<String>iter = list.iterator(); while(iter.hasNext()){ String s = iter.next(); if(s.equals("a")){ list.remove(0); // iter.remove(); } } } } 这是程序就会报出如下异常: Exception in thread"main"ja...