做了一个系统的登陆界面，验证时出错。求大神解决！

Question

为什么我用户名、密码 正确输入了admin和123，逻辑上判断是false？

        button1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {


                String str=textField.getText();
                char ch[]=passwordField.getPassword();
                String pass=new String(ch);

                /*
                boolean bool1= str=="admin";
                boolean bool2= pass=="123";

                System.out.println(bool1);
                System.out.println(bool2);
                */
                if (str=="admin" || pass=="123" ) {
                    mainpage p=new mainpage();
                    dispose();
                }
                else {
                    JOptionPane.showMessageDialog(null, "用户名或密码错误！","登陆失败！",JOptionPane.PLAIN_MESSAGE);
                }
            }
        });

Answer 1

不要用==对比，完后str=="admin" || pass=="123" 应该是&&