【Java】 int与String类型间的相互转化

public class Test {
	public static void main(String[] args) {
	    /*
	     * int类型转String类型
	     */
	    int n1 = 9;
	    //1.采用String类的valueOf方法
	    String s1=String.valueOf(n1);
	    //2.采用+""的形式
	    String s2= n1+"";
	    //3.Integer的toString方法
	    String s3= Integer.toString(n1);
	    System.out.println("Number "+n1+" to String is:"+s1);
	    System.out.println("Number "+n1+" to String is:"+s2);
	    System.out.println("Number "+n1+" to String is:"+s3);
 
	    /*
	     * String类型转int类型
	     */
	    String s="123";
	    int i = Integer.parseInt( s );
	    System.out.println("String "+s+" to number is:"+i);
	}
}

　　

Number  to String is:
Number  to String is:
Number  to String is:
String  to number is: