How do I exit a while loop in Java?

break is what you're looking for:

while (true) {
    if (obj == null) break;
}

alternatively, restructure your loop:

while (obj != null) {
    // do stuff
}

or:

do {
    // do stuff
} while (obj != null);

while(obj != null){
  // statements.
}

Use break:

while (true) {
    ....
    if (obj == null) {
        break;
    }
    ....
}

However, if your code looks exactly like you have specified you can use a normal while loop and change the condition to obj != null:

while (obj != null) {
    ....
}

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