在代码里面写什么才能让输出的内容换行

public class ppp {

public static void main(String[] args){

    int one=10;

    int two=20;

    int three=0;

    three=one+two;

    System.out.print("three=one+two==>"+three);

    three+=one;

    System.out.println("three +=one==>"+three);

}

}

输出内容是

three=one+two==>30three +=one==>40

我希望他输出

three=one+two==>30

three +=one==>40