");sb.append(System.lineSeparator());// 添加换行符sb.append("this is an example of StringBuilder.");sb.append(System.lineSeparator());// 再次添加换行符sb.append("We can easily insert new lines in our string.");System.out.println(sb.toString());}}...
importjava.util.Scanner;publicclassStringBuilderExample{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);StringBuilderstringBuilder=newStringBuilder();System.out.println("请输入多行文本(输入 'exit' 退出):");while(true){Stringline=scanner.nextLine();if(line.equalsIgnoreCase("exit")...
For example, if z refers to a string builder object whose current contents are "start", then the method call z.append("le") would cause the string builder to contain "startle", whereas z.insert(4, "le") would alter the string builder to contain "starlet". In general, if sb refers...
不可变字符串:String。在地址不变的情况下,字符串不可改变 可变字符串:StringBuilder,StringBuffer。地址不变的情况下,想把“ab”变成“abcd”是可能的,直接追加即可sb.append("cd") 区别与联系 String类是不可变类,即一旦一个String对象被创建后,包含在这个对象中的字符序列是不可改变的,直至这个对象销毁。 Strin...
Example: class StringBufferBuilder1 { public static void main(String args[]){ String s= new String("java "); s.concat("in simple way"); System.out.println(s); StringBuffer buffer= new StringBuffer("java "); buffer.append("in simple way"); System.out.println(buffer); StringBuilder...
Example 1 public static void main(String[] args) { //通过字面量的方法:此时的s1和s2是声明在方法区中的字符串常量池中,保存在字符串常量池中,栈中存放形参变量 String s1 = "JavaEE"; String s2 = "JavaEE"; //通过new + 构造器的方法: 字符串在堆空间中开辟空间后,此时的s3和s4保存的是地址值...
比如下面的例子：public class StringBuilderExample { public static void main(String[] args) { ...
Comparator:定制排序,位于java-util包下//example 1: String实现了Comparable接口.并且重写了compareTo()方法 String[] strings = new String[]{"d","a","c","b"}; Arrays.sort(strings); System.out.println(Arrays.toString(strings)); //result:[a, b, c, d] //example 2: 自定义类让其继承Compa...
Example 1 – toString() In this example, we will create a StringBuilder object and initialize with some string passed as argument. We will get the string from the StringBuilder using toString() method. Java Program </> Copy classExample{publicstaticvoidmain(String[]args){// create a StringBui...
For example, if z refers to a string builder object whose current contents are "start", then the method call z.append("le") would cause the string builder to contain "startle", whereas z.insert(4, "le") would alter the string builder to contain "starlet". In general, if sb refers ...