實現客戶姓名錄入  

package kj;

public class kehu {
	String []names=new String[10];
	public void addName(String name){
		for(int i=0;i<names.length;i++){
		if(names[i]==null){
			names[i]=name;
			break;
		}
			
			
		}
	}
	public void showname(){
		System.out.println("        客戶姓名列表:");
		for(int i=0;i<names.length;i++){
			System.out.print(names[i]+"  ");
		}
	}
	
	

}
 

package kj;

import java.util.*;

public class shangji22 {
	public static void main(String[] args) {
		String name;
		shangji2 a = new shangji2();
		Scanner input = new Scanner(System.in);
		for (int i = 0; i < 5; i++) {
			System.out.println("請輸入姓名");
			name = input.next();
			a.addName(name);
		}
		System.out.println("請輸入要修改的名字:");
		String oldname=input.next();
		System.out.println("修改後的名字:");
		String newname=input.next();
		if(a.old(oldname, newname)){		
		a.showname();}

	}

}