Why are my if statements not working even though the conditions are met? [duplicate]

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The file that I am reading in is a single line of text that reads: M=1;JMP

I know the three variables (computation, destination, and jump) are getting the correct values, as on the line before the if statements I print them out. Even so, the if statements are not triggering. Any help would be great.

class test7
{
public static void main(String [] args)
throws IOException
{
    Scanner file=new Scanner(new FileReader("assembly.txt"));
    String line= file.nextLine();
    String computation="";
    String destination="";
    String jump="";
    int firstPosition=0;
    int secondPosition=0;

    firstPosition=(line.indexOf('='));
    secondPosition=(line.indexOf(';'));
    computation=line.substring(firstPosition+1, secondPosition);
    destination=line.substring(0,firstPosition);
    jump=line.substring(secondPosition+1);

    System.out.println(computation+" "+destination+" "+jump+"\n");

    if (computation=="1") System.out.println("has computation");
    if(destination=="M") System.out.println("has destination");
    if(jump=="JMP") System.out.println("has jump");
}

}