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package tf;
public class TestPack {
public static void main(String [] args)
{
try
{
IAnimal cAnimal = new bird();
cAnimal.shout();
IAnimal animal =(IAnimal)java.lang.Class.forName("tf.bird").newInstance();
animal.shout();
}
catch (Exception e) {
// TODO: handle exception
}
}
}
//tf.bird ¼ÓÉÏ°üÃû
//bird.java
package tf;
public class bird implements IAnimal{
public void shout()
{
System.out.println("c c jiji ");
}
}
//IAnimal.java
package tf;
public interface IAnimal {
public void shout();
}
c c jiji
c c jiji
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package Test;
import java.math.BigDecimal; //ÒýÈëÕâ¸ö°ü
public class Test {
public static void main(String[] args) {
double i = 3.856;
// ÉáµôСÊýÈ¡Õû
System.out.println("ÉáµôСÊýÈ¡Õû:Math.floor(3.856)=" + (int) Math.floor(i));
......
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¸Õ¿ªÊ¼Ñ§Ï°Java,Ò»Ö±Ïëѧµ«×ÜÊǼá³Ö²»ÏÂÀ´,»Øµ½¼Ò¾ÍÏë×ÅÍæÓÎÏ·,¿´À´ÊÇҪϾöÐÄÁË,2010ÄêÒªºÃºÃѧϰJavaÁË.
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1.
try
{
FileInputStream in=new FileInputStream("C:/1.txt");
FileOutput ......
import java.awt.*;
import java.awt.event.*;
public class TestFrame {
Frame fm = new Frame();
public void init(){
fm.setSize(300,300);
Button btn = new Button("ok");
fm.add(btn);
btn.addActionListener(ne ......
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