primitive2string.java

疯狂Java讲义_源码(含Java设计模式CHM

/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class Primitive2String
{
	public static void main(String[] args) 
	{
		String intStr = "123";
		//把一个特定字符串转换成int变量
		int it = Integer.parseInt(intStr);
		System.out.println(it);
		String floatStr = "4.56";
		//把一个特定字符串转换成float变量
		float ft = Float.parseFloat(floatStr);
		System.out.println(ft);
		//把一个float变量转换成String变量
		String ftStr = String.valueOf(2.345f);
		System.out.println(ftStr);
		//把一个double变量转换成String变量
		String dbStr = String.valueOf(3.344);
		System.out.println(dbStr);
		//把一个boolean变量转换成String变量
		String boolStr = String.valueOf(true);
		System.out.println(boolStr.toUpperCase());
	}
}