为什么这里跳不出循环？（无关代码已省略）

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;}
        }