Comment utiliser le booléen en Java

boolean isTrue;

isTrue = true;

isTrue = false;

if (isTrue) {  
    System.out.println("The statement is true.");  
} else {  
    System.out.println("The statement is false.");  
}

boolean running = true;  
while (running) {  
    // do something  
    if (someCondition) {  
        running = false;  
    }  
}

boolean a = true;  
boolean b = false;  
  
// 使用&& (AND) 操作符  
if (a && b) {  
    System.out.println("Both a and b are true.");  
} else {  
    System.out.println("At least one of a or b is false.");  
}  
  
// 使用|| (OR) 操作符  
if (a || b) {  
    System.out.println("At least one of a or b is true.");  
} else {  
    System.out.println("Both a and b are false.");  
}  
  
// 使用! (NOT) 操作符  
if (!a) {  
    System.out.println("a is false.");  
} else {  
    System.out.println("a is true.");  
}