Java软贱攻城狮

public class StringBufferDemo { public static void main(String[] args) { StringBuffer buf = new StringBuffer(); buf.append("大家").append("!好").append("我是渣渣辉!"); change(buf); System.out.println...

范例1：数组拷贝:public static void arraycopy（Object stc,int strPos,Object dest,int destPos,int length）public class Demo { public static void main(String[] args) throws Exception { int[] num = new int[] { ...

public class Demo { public static void main(String[] args) { /* * Runtime类是直接与本地运行有关的所有相关属性的集合，所有在Runtime类定影有如下方法 * 1.返回所有可用内存空间：public long tatalMemory(); * 2.返回最大可用内存孔家:public long max...

范例1：StringBuffer基本使用public class Demo { public static void main(String[] args) { // StringBuffer不能直接复制实例化 StringBuffer buf = new StringBuffer(); buf.append("Hello").append("World").append("!!")...

1.字符串反转public StringBuffer reverse();public class Demo { public static void main(String[] args) { // 1.字符串反转 StringBuffer buf = new StringBuffer("Hello"); System.out.println(buf.reverse()); }...

class Book implements Cloneable{ private String title; private double price; public Book(String title, double price) { this.title = title; this.price = price; } public void setTitle(String ...