PasswordGenerate.java

import java.util.Random;

public class PasswordGenerate {
	
	/**
	 * Password generate
	 * 
	 * @param passLength
	 *  Password length
	 * @return
	 *  password
	 */
	public static String generate(int passLength){
		int length = passLength;
		StringBuilder material = new StringBuilder();
		StringBuilder result = new StringBuilder();
		
		for(int i = 0x30;i < 0x3a; i++){
			material.append((char)i);
		}
		for(int i = 0x41; i < 0x5a; i++){
			material.append((char)i);
		}
		for(int i = 0x61; i < 0x7a; i++){
			material.append((char)i);
		}
		Random random = new Random();
		while(result.length() < length){
			result.append(material.charAt(random.nextInt(material.length())));
		}
		return result.toString();
	}
}