public class text1 
{
public static void main(String[] args) 
	{
	    System.out.println("数值型数据转换成字符");
		int a=1234;
		String b =" "+a;
		System.out.println(""+b);
		System.out.println("字符串转换成数值型");
		String c="1234.12";
		Float d= Float.parseFloat(c);
		System.out.println(""+d);
		
		}	
}
原文:https://www.cnblogs.com/zyj66/p/13657366.html