The org.springframework.util Assert class provides a convenient way of asserting that certain conditions are met during execution of a Java program. The isTrue method provides a mechanism for checking whether a boolean expression is true or false. If the expression is false, an AssertionError is thrown with the given message.
Here are some code examples using Assert.isTrue:
```java
boolean flag = true;
Assert.isTrue(flag, "Expected flag to be true");
int age = -1;
Assert.isTrue(age > 0, "Expected age to be greater than zero");
```
In the first example, the isTrue method checks that the boolean flag is true, and if it's not, it throws an AssertionError with the message "Expected flag to be true". In the second example, the isTrue method checks that the age variable is greater than zero. If it's not, an AssertionError is thrown with the message "Expected age to be greater than zero".
The org.springframework.util Assert class is part of the Spring Framework, which is a popular Java framework used for building enterprise applications.
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