格式化输出：System.out.format()

格式化输出System.out.format();：
package cn.com;


		public class Demo {
			public static void main(String args[]){
				/**
				 * 		-号左对齐，无符号 右对齐，数字，长度，很有用
				 */
				System.out.format("%-15s %5s %10s\n", "item","qty","price");
				System.out.format("%-15s %5s %10s\n", "----","---","-----");
				System.out.println("123456789123456789123456789123456789123456789");
				System.out.format("%-15.15s %5d %10.2f\n", "lalala",4,4.25);
			}
		}
结果：
item              qty      price
----              ---      -----
123456789123456789123456789123456789123456789
lalala              4       4.25