passarray.java

ＪＡＶＡ编写的一些源代码

import java.awt.Container;
import javax.swing.*;
public class PassArray extends JApplet
{
	JTextArea outputArea;
	String output;
	public void init()
	{	outputArea=new JTextArea();
		Container c=getContentPane();
		c.add(outputArea);
		int a[]={1,2,3,4,5};
		output="Effects of passing entire"+"array call-by-reference:\n"+"The values of the original array are:\n";
		for(int i=0;i<a.length;i++)
			output+=" "+a[i];
		modifyArray(a);
		output+="\n\n The values of the modified array are:\n";
		for(int i=0;i<a.length;i++)
			output+=" "+a[i];
		output+="\n\nEffects fo passing array"+"element call-by-value:\n"+"a[3] before modifyElement:"+a[3];
		modifyElement(a[3]);
		output+="\na[3] after modifyElement:"+a[3];
		outputArea.setText(output);		
	}
	public void modifyArray(int b[])
	{	for(int j=0;j<b.length;j++)
			b[j]*=2;
	}
	public void modifyElement(int e)
	{	e*=2;
	}
}