java的一些程序

1、文件读取并打印

import java.io.*;
public class readandprint{
//*********Found********
public static void main(String args[]) throws Exception{
long filePoint = 0 ;
String s;
RandomAccessFile file = new RandomAccessFile("D:\\javaceshu\\readandprint.java","r");
long fileLength = file.length();
while (filePoint<fileLength){
//*********Found********
s = file.readLine();
System.out.println(s); 
filePoint = file.getFilePointer();
                            }
file.close();
    }
}

2、图形程序显示乘法

import javax.swing.JOptionPane;
public class Java_1 {
public static void main( String args[] ) {
int x, y, result;
String xVal, yVal;
xVal = JOptionPane.showInputDialog( "输入第1个整数:" );
yVal = JOptionPane.showInputDialog( "输入第2个整数:" );
//*********Found********
x = Integer.parseInt(xVal);
y = Integer.parseInt( yVal );
result = x * y;
//*********Found********
JOptionPane.showMessageDialog( null, "两个数的积: " + result );
System.exit( 0 );
}
}

java的一些程序,布布扣,bubuko.com

java的一些程序

原文：http://www.cnblogs.com/bluewelkin/p/3579906.html