publicclassReturnStringExample{publicstaticvoidmain(String[]args){Stringresult=getString();System.out.println(result);}publicstaticStringgetString(){return"Hello, World!";}} 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 在上面的示例中,我们定义了一个名为getString的方法,该方法返回一个字符串"Hello, ...
②初始化:String s=new String; //输出s为空,什么都不显示 赋值初始化:String greeting = "Hello world!"; ③求长度:string.length(); ④连接字符串:string1.concat(string2); ⑤格式化字符串: String fs; fs = String.format("The value of the float " + "variable is %f, while " + "the value...
public class Example { public static String getString() { return "Hello, World!"; } public static void main(String[] args) { String str = getString(); System.out.println(str); } } 复制代码 在上述代码中,getString()方法返回一个字符串"Hello, World!"。在main()方法中,我们将返回的字符...
*/publicclassLoopTest{publicstaticvoidmain(String[]args){// 测试break语句System.out.println("测试break语句:");for(inti=1;i<=10;i++){if(i==5){break;}System.out.println(i);}// 测试continue语句System.out.println("测试continue语句:");for(inti=1;i<=10;i++){if(i==5){continue;}Sy...
}publicstaticintreadClassLength(String path)throwsIOException {//模拟远程读取class的文件内容 开始byte[] data =newbyte[1024 * 1024 * 2]; FileInputStream fi=newFileInputStream(path);intlength =fi.read(data); fi.close(); System.out.println(length);returnlength; ...
publicfinalclassStringimplementsjava.io.Serializable,Comparable<String>,CharSequence{/** The value is used for character storage. */privatefinal char value[];/** Cache the hash code for the string */privateint hash;// Default to 0...} ...
class; // 创建对象 Constructor<?> constructor = clazz.getConstructor(String.class, int.class); Object person = constructor.newInstance("John", 30); // 访问字段 Field nameField = clazz.getDeclaredField("name"); nameField.setAccessible(true); System.out.println("Name: " + nameField.get(...
{26returnname;27}2829publicvoidsetName(String name){30this.name =name;31}32//重写的equals比较的是属性值,没有重写过的equals比较的是地址值33@Override34publicbooleanequals(Object o){35//若本类Person等于新类o36if(this==o)37returntrue;38//若类不同或者空39if(o==null|| getClass()!=o.get...
publicclassTest { publicstaticvoidmain(String[] args) { Scanner input =newScanner(System.in); System.out.println("请输入操作数1:"); doublenum1 = input.nextDouble();// 获取用户输入的操作数1 System.out.println("请输入操作数2:");
一、return语句在无返回值类型(即返回值类型为void)的函数中使用 视频讲解: 0 例子1:(在自动生成的main方法中) 代码1: package Sort; public class returnyongfa { public static void main(String[] args) { for(int i=1;i<4;i++) { if(i==2) { return; } System.out.println("i的值为"+i)...