为什么这里跳不出循环？（无关代码已省略）

程序代码：

class ArrayOption{    private String[] str = new String[100];    public ArrayOption(){    //int jdg;    Scanner sc = new Scanner(System.in);    System.out.println("input something into the array:");    for(int i = 0;i<str.length;i++){        str[i] = sc.next();        if(str[i] == "break"){break;}        }