importjava.io.FileWriter;importjava.io.IOException;publicclassWriteToFile{publicstaticvoidmain(String[]args){Stringcontent="Hello, World!";try{FileWriterwriter=newFileWriter("output.txt");writer.write(content);writer.close();System.out.println("Successfully wrote to the file.");}catch(IOExceptione){S...
world!";byte[]bytes=content.getBytes();fos.write(bytes);fos.close();System.out.println("String has been written to file successfully.");}catch(IOException
importjava.io.FileInputStream;importjava.io.ObjectInputStream;publicclassMain{publicstaticvoidmain(String[]args){MyClassobj=null;try{FileInputStreamfileIn=newFileInputStream("path/to/file.ser");ObjectInputStreamin=newObjectInputStream(fileIn);obj=(MyClass)in.readObject();in.close();fileIn.close...
public String():初始化新创建的 String对象,以使其表示空字符序列。 public String(char[] value):通过当前参数中的字符数组来构造新的String。 public String(byte[] bytes):通过使用平台的默认字符集解码当前参数中的字节数组来构造新的String。 直接赋值的方式创建字符串对象 构造举例,代码如下: publicclassString...
equals(Object anObject):是否相等 equalsIgnoreCase(String anotherString):忽略大小写,判断是否相等 1.3.2、 转换方法: toCharArray():将此字符串转换为一个新的字符数组。 getBytes():把字符串转换成字节数组 1package com.dhb.code;23publicclassDemo4 {4publicstaticvoidmain(String[] args) {5//判断方法6Stri...
Java can help reduce costs, drive innovation, & improve application services; the #1 programming language for IoT, enterprise architecture, and cloud computing.
File(Stringpathname) 根据parent 路径名字符串和 child 路径名字符串创建一个新 File 实例。 File(Stringparent,Stringchild) 通过将给定的 file: URI 转换成一个抽象路径名来创建一个新的 File 实例。 File(URI uri) 创建File对象成功后,可以使用以下列表中的方法操作文件。
public class ObjectOutputStreamExample { public static void main(String[] args) { Employee emp = new Employee("Pankaj"); emp.setAge(35); emp.setGender("Male"); emp.setRole("CEO"); System.out.println(emp); try { FileOutputStream fos = new FileOutputStream("EmployeeObject.ser"); ...
Assert.notNull(Object object,"object is required")-对象非空 Assert.isTrue(Object object,"object must be true")-对象必须为trueAssert.notEmpty(Collection collection,"collection must not be empty")-集合非空 Assert.hasLength(String text,"text must be specified")-字符不为null且字符长度不为0Assert...
StringobjectName="testfolder/exampleobject.txt";// 填写Object下载到本地的完整路径。StringpathName="D:\\localpath\\examplefile.txt";// 填写Bucket所在地域。以华东1(杭州)为例,Region填写为cn-hangzhou。Stringregion="cn-hangzhou";// 创建OSSClient实例。ClientBuilderConfigurationclientBuilderConfiguration=...