java类型转换

//java类型转换
public class Demo2 {
	public static void main(String[] args){
		int num1 = 55;
		int num2 =77;
		String str3 = "12355588";
		String str4 = "12345222";
		long lnum5 = 123991122;
		long lnum6 = 99121222;

		//int->string
		String result1 = Integer.toString(num1)+Integer.toString(num2);
		System.out.println("int->string:num1+num2="+result1);
		//long->int
		int result2 = (int)lnum5+(int)lnum6;
		System.out.println("long->int:lnum5+lnum6="+result2);
		//long->string
		String result3 = Long.toString(lnum5)+Long.toString(lnum6);
		System.out.println("long->string:lnum5+lnum6="+result3);
		//string->int
		int result4 = Integer.parseInt(str3)+Integer.valueOf(str4).intValue();
		System.out.println("string->int:str3+str4="+result4);
		//string->long
		long result5 = Long.parseLong(str3)+Long.valueOf(str4);
		System.out.println("string->long:str3+str4="+result5);
	}